diff --git a/lib/features/approvals/presentation/dialogs/approval_detail_dialog.dart b/lib/features/approvals/presentation/dialogs/approval_detail_dialog.dart
index bf84781..f7f2056 100644
--- a/lib/features/approvals/presentation/dialogs/approval_detail_dialog.dart
+++ b/lib/features/approvals/presentation/dialogs/approval_detail_dialog.dart
@@ -11,6 +11,7 @@ import '../../../../widgets/components/superport_detail_dialog.dart';
 import '../../domain/entities/approval.dart';
 import '../../domain/entities/approval_template.dart';
 import '../../presentation/controllers/approval_controller.dart';
+import '../widgets/approval_transaction_highlight_card.dart';
 import '../../../inventory/transactions/domain/entities/stock_transaction.dart';
 
 /// 결재 상세 다이얼로그를 표시한다.
@@ -89,6 +90,11 @@ class ApprovalDetailDialogView extends StatefulWidget {
 
 class _ApprovalDetailDialogViewState extends State<ApprovalDetailDialogView> {
   int? _selectedTemplateId;
+  late final intl.NumberFormat _currencyFormatter = intl.NumberFormat.currency(
+    locale: 'ko_KR',
+    symbol: '₩',
+    decimalDigits: 0,
+  );
 
   @override
   void initState() {
@@ -441,23 +447,38 @@ class _ApprovalDetailDialogViewState extends State<ApprovalDetailDialogView> {
           );
         }
 
+        final highlightCard =
+            (isTransactionLoading ||
+                transaction != null ||
+                transactionError != null)
+            ? ApprovalTransactionHighlightCard(
+                key: const ValueKey('approval_transaction_highlight_card'),
+                transaction: transaction,
+                isLoading: isTransactionLoading,
+                errorMessage: transactionError,
+                currencyFormatter: _currencyFormatter,
+                dateFormat: widget.dateFormat,
+              )
+            : null;
+        final summaryChildren = <Widget>[
+          if (highlightCard != null) ...[
+            highlightCard,
+            const SizedBox(height: 16),
+          ],
+          Text('결재번호 ${approval.approvalNo}', style: theme.textTheme.h4),
+          const SizedBox(height: 4),
+          Text('트랜잭션 ${approval.transactionNo}', style: theme.textTheme.muted),
+          if (transaction != null) ...[
+            const SizedBox(height: 2),
+            Text(
+              '${transaction.type.name} · ${transaction.warehouse.name}',
+              style: theme.textTheme.small,
+            ),
+          ],
+        ];
         final summary = Column(
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text('결재번호 ${approval.approvalNo}', style: theme.textTheme.h4),
-            const SizedBox(height: 4),
-            Text(
-              '트랜잭션 ${approval.transactionNo}',
-              style: theme.textTheme.muted,
-            ),
-            if (transaction != null) ...[
-              const SizedBox(height: 2),
-              Text(
-                '${transaction.type.name} · ${transaction.warehouse.name}',
-                style: theme.textTheme.small,
-              ),
-            ],
-          ],
+          children: summaryChildren,
         );
         final summaryBadges = _buildSummaryBadges(approval, transaction);
         final metadata = _buildMetadata(
diff --git a/lib/features/approvals/presentation/widgets/approval_transaction_highlight_card.dart b/lib/features/approvals/presentation/widgets/approval_transaction_highlight_card.dart
new file mode 100644
index 0000000..270ed2b
--- /dev/null
+++ b/lib/features/approvals/presentation/widgets/approval_transaction_highlight_card.dart
@@ -0,0 +1,468 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart' as intl;
+import 'package:shadcn_ui/shadcn_ui.dart';
+
+import '../../../inventory/transactions/domain/entities/stock_transaction.dart';
+
+/// 결재 상세 팝업 상단에서 입고/출고/대여 전표의 핵심 정보를 즉시 확인할 수 있는 카드.
+class ApprovalTransactionHighlightCard extends StatelessWidget {
+  const ApprovalTransactionHighlightCard({
+    super.key,
+    required this.transaction,
+    required this.isLoading,
+    required this.errorMessage,
+    required this.currencyFormatter,
+    required this.dateFormat,
+  });
+
+  final StockTransaction? transaction;
+  final bool isLoading;
+  final String? errorMessage;
+  final intl.NumberFormat currencyFormatter;
+  final intl.DateFormat dateFormat;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = ShadTheme.of(context);
+    final content = _buildContent(theme);
+    if (content == null) {
+      return const SizedBox.shrink();
+    }
+    return ShadCard(padding: const EdgeInsets.all(16), child: content);
+  }
+
+  Widget? _buildContent(ShadThemeData theme) {
+    if (isLoading) {
+      return Row(
+        children: [
+          const SizedBox(
+            width: 20,
+            height: 20,
+            child: CircularProgressIndicator(strokeWidth: 2),
+          ),
+          const SizedBox(width: 12),
+          Text('전표 정보를 불러오는 중입니다.', style: theme.textTheme.p),
+        ],
+      );
+    }
+    if (errorMessage != null) {
+      return _buildStatusText(
+        theme,
+        errorMessage!,
+        color: theme.colorScheme.destructiveForeground,
+      );
+    }
+    final txn = transaction;
+    if (txn == null) {
+      return _buildStatusText(theme, '연결된 전표 정보가 없습니다.');
+    }
+    final flow = _resolveTransactionFlow(txn.type.name);
+    final routeInfo = _RouteInfo.from(flow, txn);
+    final stats = _buildStats(flow, txn);
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Wrap(spacing: 8, runSpacing: 8, children: _buildBadges(flow, txn)),
+        const SizedBox(height: 12),
+        _RouteSummary(route: routeInfo),
+        if (stats.isNotEmpty) ...[
+          const SizedBox(height: 12),
+          _RouteStats(stats: stats),
+        ],
+        const SizedBox(height: 16),
+        _LineItemTable(lines: txn.lines, currencyFormatter: currencyFormatter),
+      ],
+    );
+  }
+
+  Widget _buildStatusText(ShadThemeData theme, String message, {Color? color}) {
+    return Row(
+      children: [
+        Icon(
+          Icons.info_outline,
+          size: 18,
+          color: color ?? theme.colorScheme.mutedForeground,
+        ),
+        const SizedBox(width: 8),
+        Expanded(
+          child: Text(message, style: theme.textTheme.p.copyWith(color: color)),
+        ),
+      ],
+    );
+  }
+
+  List<_RouteStat> _buildStats(
+    _TransactionFlow flow,
+    StockTransaction transaction,
+  ) {
+    final stats = <_RouteStat>[
+      _RouteStat(label: '품목 수', value: '${transaction.itemCount}건'),
+      _RouteStat(
+        label: '총 수량',
+        value: _formatQuantity(transaction.totalQuantity),
+      ),
+    ];
+    if (flow == _TransactionFlow.inbound) {
+      stats.add(
+        _RouteStat(
+          label: '총 금액',
+          value: currencyFormatter.format(transaction.lines.totalAmount),
+        ),
+      );
+    }
+    final expectedReturn = transaction.expectedReturnDate;
+    if (flow == _TransactionFlow.rental && expectedReturn != null) {
+      stats.add(
+        _RouteStat(
+          label: '예상 반납일',
+          value: dateFormat.format(expectedReturn.toLocal()),
+        ),
+      );
+    }
+    return stats;
+  }
+
+  List<Widget> _buildBadges(
+    _TransactionFlow flow,
+    StockTransaction transaction,
+  ) {
+    final typeLabel = () {
+      switch (flow) {
+        case _TransactionFlow.inbound:
+          return '입고';
+        case _TransactionFlow.outbound:
+          return '출고';
+        case _TransactionFlow.rental:
+          return '대여';
+        case _TransactionFlow.unknown:
+          return transaction.type.name;
+      }
+    }();
+    return [
+      ShadBadge(child: Text(typeLabel)),
+      ShadBadge.outline(child: Text(transaction.status.name)),
+    ];
+  }
+}
+
+class _RouteSummary extends StatelessWidget {
+  const _RouteSummary({required this.route});
+
+  final _RouteInfo route;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = ShadTheme.of(context);
+    final children = [
+      _RouteTile(label: '출발지', value: route.sourceValue),
+      _RouteTile(label: '도착지', value: route.destinationValue),
+    ];
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final isNarrow = constraints.maxWidth < 520;
+        if (isNarrow) {
+          return Column(
+            crossAxisAlignment: CrossAxisAlignment.stretch,
+            children: [
+              for (var index = 0; index < children.length; index++) ...[
+                if (index > 0) const SizedBox(height: 12),
+                Container(
+                  padding: const EdgeInsets.all(12),
+                  decoration: BoxDecoration(
+                    color: theme.colorScheme.muted.withValues(alpha: 0.04),
+                    borderRadius: BorderRadius.circular(8),
+                  ),
+                  child: children[index],
+                ),
+              ],
+            ],
+          );
+        }
+        return Row(
+          children: [
+            for (var index = 0; index < children.length; index++) ...[
+              if (index > 0) const SizedBox(width: 12),
+              Expanded(
+                child: Container(
+                  padding: const EdgeInsets.all(12),
+                  decoration: BoxDecoration(
+                    color: theme.colorScheme.muted.withValues(alpha: 0.04),
+                    borderRadius: BorderRadius.circular(8),
+                  ),
+                  child: children[index],
+                ),
+              ),
+            ],
+          ],
+        );
+      },
+    );
+  }
+}
+
+class _RouteTile extends StatelessWidget {
+  const _RouteTile({required this.label, required this.value});
+
+  final String label;
+  final String value;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = ShadTheme.of(context);
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Text(
+          label,
+          style: theme.textTheme.small.copyWith(
+            fontWeight: FontWeight.w600,
+            color: theme.colorScheme.mutedForeground,
+          ),
+        ),
+        const SizedBox(height: 4),
+        Text(value, style: theme.textTheme.p),
+      ],
+    );
+  }
+}
+
+class _RouteStats extends StatelessWidget {
+  const _RouteStats({required this.stats});
+
+  final List<_RouteStat> stats;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final maxWidth = constraints.maxWidth.isFinite
+            ? constraints.maxWidth
+            : MediaQuery.of(context).size.width;
+        final columns = maxWidth < 520 ? 1 : 3;
+        final spacing = columns == 1 ? 0.0 : 12.0;
+        final tileWidth = columns == 1
+            ? maxWidth
+            : (maxWidth - spacing * (columns - 1)) / columns;
+        return Wrap(
+          spacing: 12,
+          runSpacing: 12,
+          children: stats
+              .map(
+                (stat) => SizedBox(
+                  width: columns == 1 ? maxWidth : tileWidth,
+                  child: _RouteTile(label: stat.label, value: stat.value),
+                ),
+              )
+              .toList(growable: false),
+        );
+      },
+    );
+  }
+}
+
+class _LineItemTable extends StatelessWidget {
+  const _LineItemTable({required this.lines, required this.currencyFormatter});
+
+  final List<StockTransactionLine> lines;
+  final intl.NumberFormat currencyFormatter;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = ShadTheme.of(context);
+    if (lines.isEmpty) {
+      return Text('등록된 라인 품목이 없습니다.', style: theme.textTheme.muted);
+    }
+    final header = <ShadTableCell>[
+      const ShadTableCell.header(child: Text('라인')),
+      const ShadTableCell.header(child: Text('품목')),
+      const ShadTableCell.header(child: Text('단위')),
+      const ShadTableCell.header(child: Text('수량')),
+      const ShadTableCell.header(child: Text('단가')),
+      const ShadTableCell.header(child: Text('금액')),
+      const ShadTableCell.header(child: Text('비고')),
+    ];
+    final quantityFormatter = intl.NumberFormat.decimalPattern('ko_KR');
+    final rows = lines
+        .map(
+          (line) => <ShadTableCell>[
+            ShadTableCell(child: Text('${line.lineNo}')),
+            ShadTableCell(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(_productLabel(line.product.code, line.product.name)),
+                  if (line.product.vendor?.name != null)
+                    Text(
+                      line.product.vendor!.name,
+                      style: theme.textTheme.small,
+                    ),
+                ],
+              ),
+            ),
+            ShadTableCell(child: Text(line.product.uom?.name ?? '-')),
+            ShadTableCell(
+              child: Text('${quantityFormatter.format(line.quantity)}개'),
+            ),
+            ShadTableCell(
+              child: Text(currencyFormatter.format(line.unitPrice)),
+            ),
+            ShadTableCell(
+              child: Text(
+                currencyFormatter.format(line.unitPrice * line.quantity),
+              ),
+            ),
+            ShadTableCell(child: Text(_formatOptional(line.note))),
+          ],
+        )
+        .toList(growable: false);
+    final tableHeight = _lineTableHeight(rows.length);
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        Text(
+          '라인 품목',
+          style: theme.textTheme.small.copyWith(fontWeight: FontWeight.w600),
+        ),
+        const SizedBox(height: 8),
+        SizedBox(
+          height: tableHeight,
+          child: ShadTable.list(
+            header: header,
+            children: rows,
+            columnSpanExtent: (index) =>
+                FixedTableSpanExtent(_lineColumnWidth(index)),
+          ),
+        ),
+      ],
+    );
+  }
+
+  String _formatOptional(String? value) {
+    if (value == null || value.trim().isEmpty) {
+      return '-';
+    }
+    return value.trim();
+  }
+
+  double _lineColumnWidth(int index) {
+    const widths = [60.0, 260.0, 80.0, 80.0, 120.0, 140.0, 160.0];
+    if (index < widths.length) {
+      return widths[index];
+    }
+    return widths.last;
+  }
+
+  double _lineTableHeight(int rowCount) {
+    const rowHeight = 52.0;
+    return (rowCount + 1) * rowHeight;
+  }
+}
+
+class _RouteInfo {
+  _RouteInfo({required this.sourceValue, required this.destinationValue});
+
+  final String sourceValue;
+  final String destinationValue;
+
+  factory _RouteInfo.from(_TransactionFlow flow, StockTransaction transaction) {
+    switch (flow) {
+      case _TransactionFlow.inbound:
+        return _RouteInfo(
+          sourceValue: _sourceVendors(transaction.lines),
+          destinationValue: _warehouseLabel(transaction.warehouse),
+        );
+      case _TransactionFlow.outbound:
+      case _TransactionFlow.rental:
+        return _RouteInfo(
+          sourceValue: _warehouseLabel(transaction.warehouse),
+          destinationValue: _customerSummary(transaction.customers),
+        );
+      case _TransactionFlow.unknown:
+        return _RouteInfo(
+          sourceValue: _warehouseLabel(transaction.warehouse),
+          destinationValue: '-',
+        );
+    }
+  }
+}
+
+class _RouteStat {
+  const _RouteStat({required this.label, required this.value});
+
+  final String label;
+  final String value;
+}
+
+enum _TransactionFlow { inbound, outbound, rental, unknown }
+
+_TransactionFlow _resolveTransactionFlow(String rawTypeName) {
+  final normalized = rawTypeName.toLowerCase();
+  if (normalized.contains('입고') || normalized.contains('inbound')) {
+    return _TransactionFlow.inbound;
+  }
+  if (normalized.contains('출고') || normalized.contains('outbound')) {
+    return _TransactionFlow.outbound;
+  }
+  if (normalized.contains('대여') || normalized.contains('rental')) {
+    return _TransactionFlow.rental;
+  }
+  return _TransactionFlow.unknown;
+}
+
+String _formatQuantity(int value) {
+  final formatter = intl.NumberFormat.decimalPattern('ko_KR');
+  return '${formatter.format(value)}개';
+}
+
+String _productLabel(String code, String name) {
+  final trimmedCode = code.trim();
+  final trimmedName = name.trim();
+  if (trimmedCode.isEmpty) {
+    return trimmedName.isEmpty ? '-' : trimmedName;
+  }
+  if (trimmedName.isEmpty) {
+    return trimmedCode;
+  }
+  return '$trimmedCode · $trimmedName';
+}
+
+String _warehouseLabel(StockTransactionWarehouse warehouse) {
+  final code = warehouse.code.trim();
+  final name = warehouse.name.trim();
+  if (code.isEmpty) {
+    return name.isEmpty ? '창고 정보 없음' : name;
+  }
+  if (name.isEmpty) {
+    return code;
+  }
+  return '$name ($code)';
+}
+
+String _sourceVendors(List<StockTransactionLine> lines) {
+  final names = lines
+      .map((line) => line.product.vendor?.name ?? '')
+      .map((name) => name.trim())
+      .where((name) => name.isNotEmpty)
+      .toSet()
+      .toList(growable: false);
+  if (names.isEmpty) {
+    return '-';
+  }
+  return names.join(', ');
+}
+
+String _customerSummary(List<StockTransactionCustomer> customers) {
+  if (customers.isEmpty) {
+    return '-';
+  }
+  final names = customers
+      .map((customer) => customer.customer.name.trim())
+      .where((name) => name.isNotEmpty)
+      .toSet()
+      .toList(growable: false);
+  if (names.isEmpty) {
+    return '-';
+  }
+  return names.join(', ');
+}
diff --git a/test/features/approvals/presentation/dialogs/approval_detail_dialog_test.dart b/test/features/approvals/presentation/dialogs/approval_detail_dialog_test.dart
index a5302bc..f691af4 100644
--- a/test/features/approvals/presentation/dialogs/approval_detail_dialog_test.dart
+++ b/test/features/approvals/presentation/dialogs/approval_detail_dialog_test.dart
@@ -61,7 +61,7 @@ void main() {
             uom: StockTransactionUomSummary(id: 3, name: 'EA'),
           ),
           quantity: 12,
-          unitPrice: 0,
+          unitPrice: 450000,
           note: '라인 비고',
         ),
       ],
@@ -151,7 +151,6 @@ void main() {
     await controller.loadTemplates(force: true);
     await controller.loadActionOptions(force: true);
     await controller.selectApproval(sampleApproval.id!);
-    await Future<void>.delayed(const Duration(milliseconds: 10));
     expect(controller.templates, isNotEmpty);
     expect(controller.selected, isNotNull);
     expect(controller.canProceedSelected, isTrue);
@@ -197,6 +196,128 @@ void main() {
     expect(find.text('템플릿 적용'), findsOneWidget);
   });
 
+  testWidgets('입고 결재 상세 상단 카드가 파트너와 금액을 요약한다', (tester) async {
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('출발지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('한빛상사')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('1센터 (WH-001)')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('라인 품목')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('P-501 · 샘플 제품')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('총 금액')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('₩5,400,000')),
+      findsWidgets,
+    );
+  });
+
+  testWidgets('출고 결재 상세 상단 카드가 고객사 정보를 노출한다', (tester) async {
+    final outboundTransaction = sampleTransaction.copyWith(
+      type: StockTransactionType(id: 2, name: '출고'),
+      customers: [
+        StockTransactionCustomer(
+          id: 9002,
+          customer: StockTransactionCustomerSummary(
+            id: 4002,
+            code: 'C-4002',
+            name: '고객B',
+          ),
+        ),
+      ],
+    );
+
+    stockRepository.detail = outboundTransaction;
+    await controller.selectApproval(sampleApproval.id!);
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('출발지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('1센터 (WH-001)')),
+      findsWidgets,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('고객B')),
+      findsOneWidget,
+    );
+  });
+
+  testWidgets('대여 결재 상세 상단 카드가 예상 반납일을 표시한다', (tester) async {
+    final rentalTransaction = sampleTransaction.copyWith(
+      type: StockTransactionType(id: 3, name: '대여'),
+      customers: [
+        StockTransactionCustomer(
+          id: 9003,
+          customer: StockTransactionCustomerSummary(
+            id: 4003,
+            code: 'C-4003',
+            name: '고객C',
+          ),
+        ),
+      ],
+    );
+
+    stockRepository.detail = rentalTransaction;
+    await controller.selectApproval(sampleApproval.id!);
+    await openDialog(tester);
+
+    final highlightCard = find.byKey(
+      const ValueKey('approval_transaction_highlight_card'),
+    );
+    expect(highlightCard, findsOneWidget);
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('도착지')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(of: highlightCard, matching: find.text('예상 반납일')),
+      findsOneWidget,
+    );
+    expect(
+      find.descendant(
+        of: highlightCard,
+        matching: find.text('2024-01-10 00:00'),
+      ),
+      findsOneWidget,
+    );
+  });
+
   testWidgets('템플릿 적용 버튼을 누르면 assignSteps가 호출되고 성공 토스트를 노출한다', (tester) async {
     await openDialog(tester);