diff --git a/src/presentation/runningtaskmodel.h b/src/presentation/runningtaskmodel.h
--- a/src/presentation/runningtaskmodel.h
+++ b/src/presentation/runningtaskmodel.h
@@ -45,6 +45,8 @@
     Domain::Task::Ptr runningTask() const Q_DECL_OVERRIDE;
     void setRunningTask(const Domain::Task::Ptr &runningTask) Q_DECL_OVERRIDE;
 
+    void taskDeleted(const Domain::Task::Ptr &task) Q_DECL_OVERRIDE;
+
 public slots:
     void stopTask() Q_DECL_OVERRIDE;
     void doneTask() Q_DECL_OVERRIDE;
diff --git a/src/presentation/runningtaskmodel.cpp b/src/presentation/runningtaskmodel.cpp
--- a/src/presentation/runningtaskmodel.cpp
+++ b/src/presentation/runningtaskmodel.cpp
@@ -70,6 +70,12 @@
     emit runningTaskChanged(m_runningTask);
 }
 
+void RunningTaskModel::taskDeleted(const Domain::Task::Ptr &task)
+{
+    if (m_runningTask == task)
+        setRunningTask({});
+}
+
 void RunningTaskModel::stopTask()
 {
     setRunningTask(Domain::Task::Ptr());
diff --git a/src/presentation/runningtaskmodelinterface.h b/src/presentation/runningtaskmodelinterface.h
--- a/src/presentation/runningtaskmodelinterface.h
+++ b/src/presentation/runningtaskmodelinterface.h
@@ -45,6 +45,8 @@
     virtual Domain::Task::Ptr runningTask() const = 0;
     virtual void setRunningTask(const Domain::Task::Ptr &runningTask) = 0;
 
+    virtual void taskDeleted(const Domain::Task::Ptr &task) = 0;
+
 signals:
     void runningTaskChanged(const Domain::Task::Ptr &task);
 
diff --git a/src/widgets/pageview.cpp b/src/widgets/pageview.cpp
--- a/src/widgets/pageview.cpp
+++ b/src/widgets/pageview.cpp
@@ -369,6 +369,12 @@
             continue;
 
         QMetaObject::invokeMethod(m_model, "removeItem", Q_ARG(QModelIndex, currentIndex));
+        const auto data = currentIndex.data(Presentation::QueryTreeModelBase::ObjectRole);
+        if (data.isValid()) {
+            auto task = data.value<Domain::Artifact::Ptr>().objectCast<Domain::Task>();
+            if (task)
+                m_runningTaskModel->taskDeleted(task);
+        }
     }
 }
 
diff --git a/tests/units/presentation/runningtaskmodeltest.cpp b/tests/units/presentation/runningtaskmodeltest.cpp
--- a/tests/units/presentation/runningtaskmodeltest.cpp
+++ b/tests/units/presentation/runningtaskmodeltest.cpp
@@ -162,6 +162,45 @@
         QCOMPARE(spy.at(0).at(0).value<Domain::Task::Ptr>(), task2);
     }
 
+    void shouldHandleTaskDeletion()
+    {
+        // GIVEN
+        TestDependencies deps;
+        Presentation::RunningTaskModel model(deps.m_taskQueriesMockInstance, deps.m_taskRepositoryMockInstance);
+        Domain::Task::Ptr task = Domain::Task::Ptr::create();
+        model.setRunningTask(task);
+        QSignalSpy spy(&model, &Presentation::RunningTaskModel::runningTaskChanged);
+
+        // WHEN
+        model.taskDeleted(task);
+
+        // THEN
+        QCOMPARE(model.runningTask(), Domain::Task::Ptr());
+        QVERIFY(!task->isRunning());
+        QVERIFY(!task->isDone());
+        QCOMPARE(spy.count(), 1);
+        QCOMPARE(spy.at(0).at(0).value<Domain::Task::Ptr>(), Domain::Task::Ptr());
+    }
+
+    void shouldIgnoreDeletionOfAnotherTask()
+    {
+        // GIVEN
+        TestDependencies deps;
+        Presentation::RunningTaskModel model(deps.m_taskQueriesMockInstance, deps.m_taskRepositoryMockInstance);
+        Domain::Task::Ptr task = Domain::Task::Ptr::create();
+        model.setRunningTask(task);
+        QSignalSpy spy(&model, &Presentation::RunningTaskModel::runningTaskChanged);
+        Domain::Task::Ptr task2 = Domain::Task::Ptr::create();
+
+        // WHEN
+        model.taskDeleted(task2);
+
+        // THEN
+        QCOMPARE(model.runningTask(), task);
+        QVERIFY(task->isRunning());
+        QCOMPARE(spy.count(), 0);
+    }
+
 private:
 };
 
diff --git a/tests/units/widgets/pageviewtest.cpp b/tests/units/widgets/pageviewtest.cpp
--- a/tests/units/widgets/pageviewtest.cpp
+++ b/tests/units/widgets/pageviewtest.cpp
@@ -118,10 +118,12 @@
 public:
     Domain::Task::Ptr runningTask() const Q_DECL_OVERRIDE { return m_runningTask; }
     void setRunningTask(const Domain::Task::Ptr &task) Q_DECL_OVERRIDE { m_runningTask = task; }
+    void taskDeleted(const Domain::Task::Ptr &task) { m_deletedTask = task; }
     void stopTask() Q_DECL_OVERRIDE {}
     void doneTask() Q_DECL_OVERRIDE {}
 private:
     Domain::Task::Ptr m_runningTask;
+    Domain::Task::Ptr m_deletedTask;
 };
 
 class PageViewTest : public QObject
diff --git a/tests/units/widgets/runningtaskwidgettest.cpp b/tests/units/widgets/runningtaskwidgettest.cpp
--- a/tests/units/widgets/runningtaskwidgettest.cpp
+++ b/tests/units/widgets/runningtaskwidgettest.cpp
@@ -51,6 +51,13 @@
         stopTask();
     }
 
+    void taskDeleted(const Domain::Task::Ptr &task) Q_DECL_OVERRIDE
+    {
+        Q_ASSERT(task);
+        if (m_runningTask == task)
+            setRunningTask(Domain::Task::Ptr());
+    }
+
 private:
     Domain::Task::Ptr m_runningTask;
 };
@@ -167,6 +174,22 @@
         // THEN
         QVERIFY(widget.isHidden());
     }
+
+    void shouldHideOnDeletion()
+    {
+        // GIVEN
+        Widgets::RunningTaskWidget widget;
+        auto task = Domain::Task::Ptr::create();
+        RunningTaskModelStub model;
+        widget.setModel(&model);
+        model.setRunningTask(task);
+
+        // WHEN
+        model.taskDeleted(task);
+
+        // THEN
+        QVERIFY(widget.isHidden());
+    }
 };
 
 ZANSHIN_TEST_MAIN(RunningTaskWidgetTest)
diff --git a/tests/units/widgets/taskapplicationcomponentstest.cpp b/tests/units/widgets/taskapplicationcomponentstest.cpp
--- a/tests/units/widgets/taskapplicationcomponentstest.cpp
+++ b/tests/units/widgets/taskapplicationcomponentstest.cpp
@@ -36,6 +36,7 @@
 public:
     Domain::Task::Ptr runningTask() const Q_DECL_OVERRIDE { return {}; }
     void setRunningTask(const Domain::Task::Ptr &) Q_DECL_OVERRIDE {}
+    void taskDeleted(const Domain::Task::Ptr &) Q_DECL_OVERRIDE {}
     void stopTask() Q_DECL_OVERRIDE {}
     void doneTask() Q_DECL_OVERRIDE {}
 };