diff --git a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
index c5d3e463..8d4bdfd1 100644
--- a/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
+++ b/frontend/components/admin/dashboard/widgets/yard-3d/DigitalTwinViewer.tsx
@@ -401,20 +401,22 @@ export default function DigitalTwinViewer({ layoutId }: DigitalTwinViewerProps)
           </p>
         </div>
         <div className="flex items-center gap-2">
-          {/* 전체 화면 버튼 */}
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={toggleFullscreen}
-            title={isFullscreen ? "전체 화면 종료" : "전체 화면"}
-          >
-            {isFullscreen ? (
-              <Minimize className="mr-2 h-4 w-4" />
-            ) : (
-              <Maximize className="mr-2 h-4 w-4" />
-            )}
-            {isFullscreen ? "종료" : "전체 화면"}
-          </Button>
+          {/* 전체 화면 버튼 - 외부 업체 모드에서만 표시 */}
+          {isExternalMode && (
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={toggleFullscreen}
+              title={isFullscreen ? "전체 화면 종료" : "전체 화면"}
+            >
+              {isFullscreen ? (
+                <Minimize className="mr-2 h-4 w-4" />
+              ) : (
+                <Maximize className="mr-2 h-4 w-4" />
+              )}
+              {isFullscreen ? "종료" : "전체 화면"}
+            </Button>
+          )}
           <Button
             variant="outline"
             size="sm"