diff --git a/fes.html b/fes.html
index 51649d5..919fbbb 100644
--- a/fes.html
+++ b/fes.html
@@ -26,6 +26,7 @@
     <button class="tab-button" data-floor="3" role="tab" aria-selected="false">3階</button>
     <button class="tab-button" data-floor="4" role="tab" aria-selected="false">4階</button>
     <button class="tab-button" data-floor="5" role="tab" aria-selected="false">体育館</button>
+    <button class="tab-button" data-floor="6" role="tab" aria-selected="false">体育館2階</button>
   </nav>
 
   <!-- Main map area -->