diff --git a/django/contrib/postgres/fields/jsonb.py b/django/contrib/postgres/fields/jsonb.py
index b4574cc5aa..c195394409 100644
--- a/django/contrib/postgres/fields/jsonb.py
+++ b/django/contrib/postgres/fields/jsonb.py
@@ -133,6 +133,10 @@ class KeyTransformTextLookupMixin(object):
         super(KeyTransformTextLookupMixin, self).__init__(key_text_transform, *args, **kwargs)
 
 
+class KeyTransformIExact(KeyTransformTextLookupMixin, builtin_lookups.IExact):
+    pass
+
+
 class KeyTransformIContains(KeyTransformTextLookupMixin, builtin_lookups.IContains):
     pass
 
@@ -161,6 +165,7 @@ class KeyTransformIRegex(KeyTransformTextLookupMixin, builtin_lookups.IRegex):
     pass
 
 
+KeyTransform.register_lookup(KeyTransformIExact)
 KeyTransform.register_lookup(KeyTransformIContains)
 KeyTransform.register_lookup(KeyTransformStartsWith)
 KeyTransform.register_lookup(KeyTransformIStartsWith)
diff --git a/tests/postgres_tests/test_json.py b/tests/postgres_tests/test_json.py
index 9691329a49..4e8851d485 100644
--- a/tests/postgres_tests/test_json.py
+++ b/tests/postgres_tests/test_json.py
@@ -238,6 +238,10 @@ class TestQuerying(PostgreSQLTestCase):
             self.objs[7:9]
         )
 
+    def test_iexact(self):
+        self.assertTrue(JSONModel.objects.filter(field__foo__iexact='BaR').exists())
+        self.assertFalse(JSONModel.objects.filter(field__foo__iexact='"BaR"').exists())
+
     def test_icontains(self):
         self.assertFalse(JSONModel.objects.filter(field__foo__icontains='"bar"').exists())