diff --git a/src/components/menu/nz-submenu.component.ts b/src/components/menu/nz-submenu.component.ts
index f37d9ff921c..508c857bd00 100644
--- a/src/components/menu/nz-submenu.component.ts
+++ b/src/components/menu/nz-submenu.component.ts
@@ -83,7 +83,7 @@ export class NzSubMenuComponent implements OnInit, OnDestroy, AfterViewInit {
   }
 
   clickSubMenuTitle() {
-    if ((this.nzMenuComponent.nzMode === 'inline') || (!this.isInDropDown)) {
+    if ((this.nzMenuComponent.nzMode === 'inline') && (!this.isInDropDown)) {
       this.nzOpen = !this.nzOpen;
       this.nzOpenChange.emit(this.nzOpen);
     }