diff --git a/python/src/com/jetbrains/python/inspections/PyProtectedMemberInspection.java b/python/src/com/jetbrains/python/inspections/PyProtectedMemberInspection.java
index b516e10d0d78..274edce784a8 100644
--- a/python/src/com/jetbrains/python/inspections/PyProtectedMemberInspection.java
+++ b/python/src/com/jetbrains/python/inspections/PyProtectedMemberInspection.java
@@ -56,6 +56,14 @@ public class PyProtectedMemberInspection extends PyInspection {
           final PyClass resolvedClass = PsiTreeUtil.getParentOfType(resolvedExpression, PyClass.class);
           if (parentClass.isSubclass(resolvedClass))
             return;
+
+          PyClass outerClass = PsiTreeUtil.getParentOfType(parentClass, PyClass.class);
+          while (outerClass != null) {
+            if (outerClass.isSubclass(resolvedClass))
+              return;
+
+            outerClass = PsiTreeUtil.getParentOfType(outerClass, PyClass.class);
+          }
         }
         registerProblem(node, PyBundle.message("INSP.protected.member.$0.access", name));
       }
diff --git a/python/testData/inspections/PyProtectedMemberInspection/outerClass.py b/python/testData/inspections/PyProtectedMemberInspection/outerClass.py
new file mode 100644
index 000000000000..efbced59b50f
--- /dev/null
+++ b/python/testData/inspections/PyProtectedMemberInspection/outerClass.py
@@ -0,0 +1,19 @@
+
+class AbstractExperimentManager(object):
+
+    def _call_on_plugins(self, method_name, *args, **kwargs):
+        pass
+
+class EventExperimentManager(AbstractExperimentManager):
+
+
+    class __SomeEvent(object):
+
+        def __init__(self, parent):
+            """
+            :param EventExperimentManager parent: Parent
+            """
+            self.parent = parent
+
+        def __call__(self, event):
+             self.parent._call_on_plugins("foo")
\ No newline at end of file
diff --git a/python/testSrc/com/jetbrains/python/inspections/PyProtectedMemberInspectionTest.java b/python/testSrc/com/jetbrains/python/inspections/PyProtectedMemberInspectionTest.java
index 9a22725bb4b5..e3cf6b608d21 100644
--- a/python/testSrc/com/jetbrains/python/inspections/PyProtectedMemberInspectionTest.java
+++ b/python/testSrc/com/jetbrains/python/inspections/PyProtectedMemberInspectionTest.java
@@ -18,10 +18,15 @@ public class PyProtectedMemberInspectionTest extends PyTestCase {
   public void testTrueNegative() {
     doTest();
   }
+
   public void testDoubleUnderscore() {
     doTest();
   }
 
+  public void testOuterClass() {
+    doTest();
+  }
+
   private void doTest() {
     myFixture.configureByFile("inspections/PyProtectedMemberInspection/" + getTestName(true) + ".py");
     myFixture.enableInspections(PyProtectedMemberInspection.class);