diff --git a/app/Services/OrderService.php b/app/Services/OrderService.php
index 2738d57..a040d13 100644
--- a/app/Services/OrderService.php
+++ b/app/Services/OrderService.php
@@ -25,6 +25,19 @@ public function __construct(
         private NumberingService $numberingService
     ) {}
 
+    /**
+     * 상세 조회용 공통 relations (show와 동일한 구조 보장)
+     */
+    private function loadDetailRelations(Order $order): Order
+    {
+        return $order->load([
+            'client:id,name,contact_person,phone,email,manager_name',
+            'items' => fn ($q) => $q->orderBy('sort_order'),
+            'rootNodes' => fn ($q) => $q->withRecursiveChildren(),
+            'quote:id,quote_number,site_name,calculation_inputs',
+        ]);
+    }
+
     /**
      * 목록 조회 (검색/필터링/페이징)
      */
@@ -131,20 +144,13 @@ public function show(int $id)
     {
         $tenantId = $this->tenantId();
 
-        $order = Order::where('tenant_id', $tenantId)
-            ->with([
-                'client:id,name,contact_person,phone,email,manager_name',
-                'items' => fn ($q) => $q->orderBy('sort_order'),
-                'rootNodes' => fn ($q) => $q->withRecursiveChildren(),
-                'quote:id,quote_number,site_name,calculation_inputs',
-            ])
-            ->find($id);
+        $order = Order::where('tenant_id', $tenantId)->find($id);
 
         if (! $order) {
             throw new NotFoundHttpException(__('error.not_found'));
         }
 
-        return $order;
+        return $this->loadDetailRelations($order);
     }
 
     /**
@@ -260,7 +266,7 @@ public function store(array $data)
             $order->refresh();
             $order->recalculateTotals()->save();
 
-            return $order->load(['client:id,name', 'items']);
+            return $this->loadDetailRelations($order);
         });
     }
 
@@ -326,7 +332,7 @@ public function update(int $id, array $data)
                 $order->recalculateTotals()->save();
             }
 
-            return $order->load(['client:id,name', 'items']);
+            return $this->loadDetailRelations($order);
         });
     }
 
@@ -549,7 +555,7 @@ public function updateStatus(int $id, string $status)
             $order->updated_by = $userId;
             $order->save();
 
-            $result = $order->load(['client:id,name', 'items']);
+            $result = $this->loadDetailRelations($order);
 
             // 매출이 생성된 경우 응답에 포함
             if ($createdSale) {
@@ -853,7 +859,7 @@ public function createFromQuote(int $quoteId, array $data = [])
                 'updated_by' => $userId,
             ]);
 
-            return $order->load(['client:id,name', 'items', 'quote:id,quote_number']);
+            return $this->loadDetailRelations($order);
         });
     }
 
@@ -1065,7 +1071,7 @@ public function syncFromQuote(Quote $quote, int $revision): ?Order
                 'created_by' => $userId,
             ]);
 
-            return $order->load(['client:id,name', 'items', 'quote:id,quote_number']);
+            return $this->loadDetailRelations($order);
         });
     }
 
@@ -1342,7 +1348,7 @@ public function createProductionOrder(int $orderId, array $data)
             return [
                 'work_orders' => $workOrders,
                 'work_order' => $workOrders[0] ?? null, // 하위 호환성
-                'order' => $order->load(['client:id,name', 'items']),
+                'order' => $this->loadDetailRelations($order),
             ];
         });
     }
@@ -1474,7 +1480,7 @@ public function revertOrderConfirmation(int $orderId): array
             $order->save();
 
             return [
-                'order' => $order->load(['client:id,name', 'items']),
+                'order' => $this->loadDetailRelations($order),
                 'previous_status' => $previousStatus,
                 'deleted_sale_id' => $deletedSaleId,
             ];
@@ -1624,7 +1630,7 @@ private function revertProductionOrderForce(Order $order, int $tenantId, int $us
             $order->save();
 
             return [
-                'order' => $order->load(['client:id,name', 'items']),
+                'order' => $this->loadDetailRelations($order),
                 'deleted_counts' => $deletedCounts,
                 'previous_status' => $previousStatus,
             ];
@@ -1695,7 +1701,7 @@ private function revertProductionOrderCancel(Order $order, int $tenantId, int $u
             $order->save();
 
             return [
-                'order' => $order->load(['client:id,name', 'items']),
+                'order' => $this->loadDetailRelations($order),
                 'cancelled_count' => $cancelledCount,
                 'skipped_count' => count($skippedIds),
                 'skipped_ids' => $skippedIds,