diff --git a/frontend/components/dataflow/node-editor/sidebar/NodePalette.tsx b/frontend/components/dataflow/node-editor/sidebar/NodePalette.tsx
index 0167069d..80eb1ef9 100644
--- a/frontend/components/dataflow/node-editor/sidebar/NodePalette.tsx
+++ b/frontend/components/dataflow/node-editor/sidebar/NodePalette.tsx
@@ -11,7 +11,7 @@ import type { NodePaletteItem } from "@/types/node-editor";
 
 export function NodePalette() {
   const [expandedCategories, setExpandedCategories] = useState<Set<string>>(
-    new Set(["source", "transform", "action", "utility"]),
+    new Set(), // 기본적으로 모든 아코디언 닫힘
   );
 
   const toggleCategory = (categoryId: string) => {