diff --git a/css/backoffice/layout/_navigation-menu.scss b/css/backoffice/layout/_navigation-menu.scss
index 8fdbcabaa..942fabd78 100644
--- a/css/backoffice/layout/_navigation-menu.scss
+++ b/css/backoffice/layout/_navigation-menu.scss
@@ -523,6 +523,7 @@ $ibo-navigation-menu--menu-counter-color: $ibo-navigation-menu--menu-node--backg
 /* - Menu filter */
 .ibo-navigation-menu--menu-filter{
 	position: fixed;
+	z-index: 1; /* To be hover the menu groups and all their contents */
 	width: $ibo-navigation-menu--menu-filter--width;
 }
 .ibo-navigation-menu--menu-filter-input{