diff --git a/applets/taskmanager/package/contents/config/main.xml b/applets/taskmanager/package/contents/config/main.xml
--- a/applets/taskmanager/package/contents/config/main.xml
+++ b/applets/taskmanager/package/contents/config/main.xml
@@ -82,6 +82,7 @@
             <choice name="Close"/>
             <choice name="NewInstance"/>
             <choice name="ToggleMinimized"/>
+            <choice name="ToggleGrouping"/>
       </choices>
       <default>0</default>
     </entry>
diff --git a/applets/taskmanager/package/contents/ui/ConfigGeneral.qml b/applets/taskmanager/package/contents/ui/ConfigGeneral.qml
--- a/applets/taskmanager/package/contents/ui/ConfigGeneral.qml
+++ b/applets/taskmanager/package/contents/ui/ConfigGeneral.qml
@@ -158,7 +158,13 @@
                     ComboBox {
                         id: middleClickAction
                         Layout.fillWidth: true
-                        model: [i18nc("The click action", "None"), i18n("Close Window or Group"), i18n("New Instance"), i18n("Minimize/Restore Window or Group")]
+                        model: [
+                            i18nc("The click action", "None"),
+                            i18n("Close Window or Group"),
+                            i18n("New Instance"),
+                            i18n("Minimize/Restore Window or Group"),
+                            i18nc("When clicking it would toggle grouping windows of a specific app", "Group/Ungroup")
+                        ]
                     }
                 }
             }
diff --git a/applets/taskmanager/package/contents/ui/Task.qml b/applets/taskmanager/package/contents/ui/Task.qml
--- a/applets/taskmanager/package/contents/ui/Task.qml
+++ b/applets/taskmanager/package/contents/ui/Task.qml
@@ -146,6 +146,8 @@
                     tasksModel.requestClose(modelIndex());
                 } else if (plasmoid.configuration.middleClickAction == TaskManagerApplet.Backend.ToggleMinimized) {
                     tasksModel.requestToggleMinimized(modelIndex());
+                } else if (plasmoid.configuration.middleClickAction == TaskManagerApplet.Backend.ToggleGrouping) {
+                    tasksModel.requestToggleGrouping(modelIndex());
                 }
             } else if (mouse.button == Qt.LeftButton) {
                 TaskTools.activateTask(modelIndex(), model, mouse.modifiers, task);
diff --git a/applets/taskmanager/plugin/backend.h b/applets/taskmanager/plugin/backend.h
--- a/applets/taskmanager/plugin/backend.h
+++ b/applets/taskmanager/plugin/backend.h
@@ -49,7 +49,8 @@
             None = 0,
             Close,
             NewInstance,
-            ToggleMinimized
+            ToggleMinimized,
+            ToggleGrouping
         };
 
         Q_ENUM(MiddleClickAction);