diff --git a/mitmproxy/addons/view.py b/mitmproxy/addons/view.py
index 8358a0453..d2ab75f3f 100644
--- a/mitmproxy/addons/view.py
+++ b/mitmproxy/addons/view.py
@@ -230,6 +230,17 @@ class View(collections.Sequence):
         self.sig_view_refresh.send(self)
         self.sig_store_refresh.send(self)
 
+    def clear_not_marked(self):
+        """
+            Clears only the unmarked flows.
+        """
+        for flow in self._store.copy().values():
+            if not flow.marked:
+                self._store.pop(flow.id)
+
+        self._refilter()
+        self.sig_store_refresh.send(self)
+
     def add(self, f: mitmproxy.flow.Flow) -> bool:
         """
             Adds a flow to the state. If the flow already exists, it is
diff --git a/mitmproxy/tools/console/flowlist.py b/mitmproxy/tools/console/flowlist.py
index b26289af6..39811ce10 100644
--- a/mitmproxy/tools/console/flowlist.py
+++ b/mitmproxy/tools/console/flowlist.py
@@ -35,6 +35,7 @@ def _mkhelp():
         ("W", "stream flows to file"),
         ("X", "kill and delete flow, even if it's mid-intercept"),
         ("z", "clear flow list or eventlog"),
+        ("Z", "clear unmarked flows"),
         ("tab", "tab between eventlog and flow list"),
         ("enter", "view flow"),
         ("|", "run script on this flow"),
@@ -354,6 +355,8 @@ class FlowListBox(urwid.ListBox):
                     self.master.view.update(f)
         elif key == "z":
             self.master.view.clear()
+        elif key == "Z":
+            self.master.view.clear_not_marked()
         elif key == "e":
             self.master.toggle_eventlog()
         elif key == "g":
diff --git a/test/mitmproxy/addons/test_view.py b/test/mitmproxy/addons/test_view.py
index 99b12cb45..7145bfc83 100644
--- a/test/mitmproxy/addons/test_view.py
+++ b/test/mitmproxy/addons/test_view.py
@@ -108,6 +108,13 @@ def test_simple():
     assert list(v) == [f, f3, f2]
     assert len(v._store) == 3
 
+    f.marked = not f.marked
+    f2.marked = not f2.marked
+    v.clear_not_marked()
+    assert list(v) == [f, f2]
+    assert len(v) == 2
+    assert len(v._store) == 2
+
     v.clear()
     assert len(v) == 0
     assert len(v._store) == 0