diff --git a/Assets/Scripts/Editor/MyUIUtil.cs b/Assets/Scripts/Editor/MyUIUtil.cs
index 635c576..dc058cc 100644
--- a/Assets/Scripts/Editor/MyUIUtil.cs
+++ b/Assets/Scripts/Editor/MyUIUtil.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using TMPro;
 using UnityEditor;
 using UnityEngine;
@@ -5,6 +6,48 @@ using UnityEngine.UI;
 
 public static class MyUIUtil
 {
+    [MenuItem("Tools/Safe Rename Files (Space → Underscore)")]
+    public static void RenameFilesInSelectedFolder()
+    {
+        Object obj = Selection.activeObject;
+        if (obj == null)
+        {
+            Debug.LogError("폴더를 선택하세요.");
+            return;
+        }
+
+        string folderPath = AssetDatabase.GetAssetPath(obj);
+
+        if (!Directory.Exists(folderPath))
+        {
+            Debug.LogError("폴더만 선택 가능합니다.");
+            return;
+        }
+
+        string[] guids = AssetDatabase.FindAssets("", new[] { folderPath });
+
+        foreach (var guid in guids)
+        {
+            string assetPath = AssetDatabase.GUIDToAssetPath(guid);
+
+            if (assetPath.EndsWith(".meta"))
+                continue;
+
+            string name = Path.GetFileName(assetPath);
+            if (!name.Contains(" "))
+                continue;
+
+            string newName = name.Replace(" ", "_");
+
+            AssetDatabase.RenameAsset(assetPath, Path.GetFileNameWithoutExtension(newName));
+            Debug.Log($"변경: {name} → {newName}");
+        }
+
+        AssetDatabase.SaveAssets();
+        AssetDatabase.Refresh();
+        Debug.Log("완료!");
+    }
+
     static string path_whitebg = "Assets/ResWork/UI_Image/Common/whitebg.png";
 
     static void SetLayerRecursively(GameObject obj, string newLayer = "UI")