diff --git a/app/Services/OrderService.php b/app/Services/OrderService.php
index bad0a47c..314b0e9c 100644
--- a/app/Services/OrderService.php
+++ b/app/Services/OrderService.php
@@ -401,6 +401,18 @@ public function update(int $id, array $data)
                     }
 
                     $this->calculateItemAmounts($item);
+
+                    // item_id가 없고 item_code가 있으면 item_code로 조회하여 보완
+                    if (empty($item['item_id']) && ! empty($item['item_code'])) {
+                        $foundItem = Item::withoutGlobalScopes()
+                            ->where('tenant_id', $tenantId)
+                            ->where('code', $item['item_code'])
+                            ->first();
+                        if ($foundItem) {
+                            $item['item_id'] = $foundItem->id;
+                        }
+                    }
+
                     $order->items()->create($item);
                 }
 
diff --git a/app/Services/WorkOrderService.php b/app/Services/WorkOrderService.php
index ca2d422c..5aeea12a 100644
--- a/app/Services/WorkOrderService.php
+++ b/app/Services/WorkOrderService.php
@@ -63,7 +63,7 @@ public function index(array $params)
                 'process:id,process_name,process_code,department,options',
                 'items:id,work_order_id,item_id,item_name,specification,quantity,unit,status,options,sort_order,source_order_item_id',
                 'items.item:id,code',
-                'items.sourceOrderItem:id,order_node_id,floor_code,symbol_code',
+                'items.sourceOrderItem:id,order_node_id,floor_code,symbol_code,item_code',
                 'items.sourceOrderItem.node:id,name,code',
                 'items.materialInputs:id,work_order_id,work_order_item_id,stock_lot_id,item_id,qty,input_by,input_at',
                 'items.materialInputs.stockLot:id,lot_no',
@@ -347,7 +347,7 @@ public function show(int $id)
                 'process:id,process_name,process_code,work_steps,department,options',
                 'process.steps' => fn ($q) => $q->where('is_active', true)->orderBy('sort_order'),
                 'items.item:id,code',
-                'items.sourceOrderItem:id,order_node_id,floor_code,symbol_code',
+                'items.sourceOrderItem:id,order_node_id,floor_code,symbol_code,item_code',
                 'items.sourceOrderItem.node:id,name,code',
                 'items.materialInputs:id,work_order_id,work_order_item_id,stock_lot_id,item_id,qty,input_by,input_at',
                 'items.materialInputs.stockLot:id,lot_no',