diff --git a/src/iaccessible.h b/src/iaccessible.h
index 752187b..6e5909d 100644
--- a/src/iaccessible.h
+++ b/src/iaccessible.h
@@ -514,4 +514,24 @@ bool IsOnDialog(HWND hwnd, POINT pt) {
   return flag;
 }
 
+// Whether the mouse is on the close button of a tab.
+// Should be used together with `IsOnOneTab` to search the close button.
+bool IsOnCloseButton(NodePtr top, POINT pt) {
+  bool flag = false;
+  TraversalAccessible(
+      top,
+      [&pt, &flag](NodePtr child) {
+        if (GetAccessibleRole(child) == ROLE_SYSTEM_PUSHBUTTON) {
+          GetAccessibleSize(child, [&pt, &flag](RECT rect) {
+            if (PtInRect(&rect, pt)) {
+              flag = true;
+            }
+          });
+        }
+        return flag;
+      },
+      true);  // raw_traversal
+  return flag;
+}
+
 #endif  // IACCESSIBLE_H_
diff --git a/src/tabbookmark.h b/src/tabbookmark.h
index 756281f..a04b151 100644
--- a/src/tabbookmark.h
+++ b/src/tabbookmark.h
@@ -123,18 +123,18 @@ int HandleDoubleClick(WPARAM wParam, PMOUSEHOOKSTRUCT pmouse) {
   }
 
   bool is_on_one_tab = IsOnOneTab(top_container_view, pmouse->pt);
+  bool is_on_close_button = IsOnCloseButton(top_container_view, pmouse->pt);
   bool is_only_one_tab = IsOnlyOneTab(top_container_view);
-
-  if (is_on_one_tab) {
-    if (is_only_one_tab) {
-      ExecuteCommand(IDC_NEW_TAB, hwnd);
-      ExecuteCommand(IDC_WINDOW_CLOSE_OTHER_TABS, hwnd);
-    } else {
-      ExecuteCommand(IDC_CLOSE_TAB, hwnd);
-    }
-    return 1;
+  if (!is_on_one_tab || is_on_close_button) {
+    return 0;
   }
-  return 0;
+  if (is_only_one_tab) {
+    ExecuteCommand(IDC_NEW_TAB, hwnd);
+    ExecuteCommand(IDC_WINDOW_CLOSE_OTHER_TABS, hwnd);
+  } else {
+    ExecuteCommand(IDC_CLOSE_TAB, hwnd);
+  }
+  return 1;
 }
 
 // Right-click to close tab (Hold Shift to show the original menu).