diff --git a/src/hooks/surface/usePlacementShapeDrawing.js b/src/hooks/surface/usePlacementShapeDrawing.js
index 50f61172..983583ba 100644
--- a/src/hooks/surface/usePlacementShapeDrawing.js
+++ b/src/hooks/surface/usePlacementShapeDrawing.js
@@ -688,8 +688,9 @@ export function usePlacementShapeDrawing(id) {
       }
       // 포커스가 length1에 있지 않으면 length1에 포커스를 줌
       const activeElem = document.activeElement
+
       if (activeElem !== length1Ref.current) {
-        length1Ref.current.focus()
+        length1Ref.current?.focus()
       }
 
       const key = e.key
@@ -698,7 +699,7 @@ export function usePlacementShapeDrawing(id) {
         return
       }
 
-      const lengthNum = Number(length1Ref.current.value) / 10
+      const lengthNum = Number(length1Ref.current?.value) / 10
       if (lengthNum === 0) {
         return
       }