diff --git a/app/Http/Controllers/Api/V1/StockController.php b/app/Http/Controllers/Api/V1/StockController.php
index 4d2eca28..1fdfd9d7 100644
--- a/app/Http/Controllers/Api/V1/StockController.php
+++ b/app/Http/Controllers/Api/V1/StockController.php
@@ -8,6 +8,7 @@
 use App\Services\StockService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
 
 class StockController extends Controller
 {
@@ -126,4 +127,95 @@ public function storeAdjustment(int $id, StoreStockAdjustmentRequest $request):
             return ApiResponse::error(__('error.stock.not_found'), 404);
         }
     }
+
+    /**
+     * 재고 거래이력 (사용현황)
+     * GET /api/v1/stocks/{id}/transactions
+     */
+    public function transactions(int $id): JsonResponse
+    {
+        $tenantId = app('tenant_id');
+
+        $stock = DB::table('stocks')
+            ->where('tenant_id', $tenantId)
+            ->where('item_id', $id)
+            ->first();
+
+        if (! $stock) {
+            // item_id로 직접 검색
+            $stock = DB::table('stocks')
+                ->where('tenant_id', $tenantId)
+                ->where('id', $id)
+                ->first();
+        }
+
+        $stockId = $stock?->id;
+        $itemCode = $stock?->item_code;
+
+        $transactions = DB::table('stock_transactions')
+            ->where('tenant_id', $tenantId)
+            ->where(function ($q) use ($stockId, $itemCode) {
+                if ($stockId) {
+                    $q->where('stock_id', $stockId);
+                }
+                if ($itemCode) {
+                    $q->orWhere('item_code', $itemCode);
+                }
+            })
+            ->orderByDesc('created_at')
+            ->limit(100)
+            ->get([
+                'id', 'type', 'qty', 'balance_qty', 'reference_type', 'reference_id',
+                'lot_no', 'reason', 'remark', 'item_code', 'item_name', 'created_by', 'created_at',
+            ]);
+
+        // 참조 정보 보강 (work_order 번호 등)
+        $woIds = $transactions->where('reference_type', 'work_order_input')
+            ->pluck('reference_id')->unique()->values();
+        $woMap = [];
+        if ($woIds->isNotEmpty()) {
+            $woMap = DB::table('work_orders')
+                ->whereIn('id', $woIds)
+                ->pluck('work_order_no', 'id')
+                ->toArray();
+        }
+
+        $data = $transactions->map(function ($tx) use ($woMap) {
+            $refLabel = match ($tx->reference_type) {
+                'work_order_input' => '자재투입',
+                'work_order_input_cancel' => '자재투입 취소',
+                'work_order_input_replace' => '자재투입 교체',
+                'receiving' => '입고',
+                'adjustment' => '재고조정',
+                'shipment' => '출하',
+                default => $tx->reference_type ?? '-',
+            };
+            $refNo = $woMap[$tx->reference_id] ?? null;
+
+            return [
+                'id' => $tx->id,
+                'type' => $tx->type,
+                'type_label' => $refLabel,
+                'qty' => (float) $tx->qty,
+                'balance_qty' => (float) $tx->balance_qty,
+                'reference_type' => $tx->reference_type,
+                'reference_id' => $tx->reference_id,
+                'reference_no' => $refNo,
+                'lot_no' => $tx->lot_no,
+                'reason' => $tx->reason,
+                'remark' => $tx->remark,
+                'item_code' => $tx->item_code,
+                'item_name' => $tx->item_name,
+                'created_at' => $tx->created_at,
+            ];
+        });
+
+        return ApiResponse::success([
+            'item_code' => $stock?->item_code,
+            'item_name' => $stock?->item_name,
+            'current_qty' => (float) ($stock?->stock_qty ?? 0),
+            'available_qty' => (float) ($stock?->available_qty ?? 0),
+            'transactions' => $data,
+        ]);
+    }
 }
diff --git a/routes/api/v1/inventory.php b/routes/api/v1/inventory.php
index bcb2bb2f..115e7eaf 100644
--- a/routes/api/v1/inventory.php
+++ b/routes/api/v1/inventory.php
@@ -115,6 +115,7 @@
     Route::put('/{id}', [StockController::class, 'update'])->whereNumber('id')->name('v1.stocks.update');
     Route::get('/{id}/adjustments', [StockController::class, 'adjustments'])->whereNumber('id')->name('v1.stocks.adjustments');
     Route::post('/{id}/adjustments', [StockController::class, 'storeAdjustment'])->whereNumber('id')->name('v1.stocks.adjustments.store');
+    Route::get('/{id}/transactions', [StockController::class, 'transactions'])->whereNumber('id')->name('v1.stocks.transactions');
 });
 
 // Shipment API (출하 관리)