diff --git a/lib/attr_json/record.rb b/lib/attr_json/record.rb
index 408ecaa..8411890 100644
--- a/lib/attr_json/record.rb
+++ b/lib/attr_json/record.rb
@@ -186,6 +186,18 @@ def attr_json(name, type, **options)
             # implementation of `query_store_attribute` is based on Rails `query_attribute` implementation
             AttrJson::Record.attr_json_query_method(self, name)
           end
+
+          define_method("#{name}_changed?") do
+            if !defined?(attr_json_changes)
+              raise NotImplementedError, <<~TXT
+                Please add the following line to #{self.class}:
+                include AttrJson::Record::Dirty
+              TXT
+            end
+
+            # see lib/attr_json/record/dirty.rb
+            attr_json_changes.send("will_save_change_to_#{name}?")
+          end
         end
 
         # Default attr_json_accepts_nested_attributes_for values
diff --git a/spec/record_spec.rb b/spec/record_spec.rb
index 281361e..245916d 100644
--- a/spec/record_spec.rb
+++ b/spec/record_spec.rb
@@ -68,12 +68,21 @@
         expect(instance.value).to eq(cast_value)
         expect(instance.json_attributes["value"]).to eq(cast_value)
       end
-      it "generates a query method #{type}?" do
+      it "generates a query method value?" do
         instance.value = cast_value
         expect(instance.value?).to be(true)
         instance.value = falsey_value
         expect(instance.value?).to be(false)
       end
+      it "generates a dirty tracking method value_changed?" do
+        expect { instance.value_changed? }.to raise_error(NotImplementedError)
+        klass.include AttrJson::Record::Dirty
+        expect(instance.value_changed?).to be(false)
+        instance.value = cast_value
+        expect(instance.value_changed?).to be(true)
+        instance.value = nil
+        expect(instance.value_changed?).to be(false)
+      end
     end
   end