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diff --git a/runtime/onert/core/include/backend/IOptimizer.h b/runtime/onert/core/include/backend/IOptimizer.h
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+++ b/runtime/onert/core/include/backend/IOptimizer.h
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+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ONERT_BACKEND_I_OPTIMIZER_H__
+#define __ONERT_BACKEND_I_OPTIMIZER_H__
+
+namespace onert
+{
+namespace ir
+{
+class LoweredGraph;
+}
+} // namespace onert
+
+namespace onert
+{
+namespace backend
+{
+
+/**
+ * @brief Class for backend optimizations. This is an optional class so not all backends must have
+ * it.
+ *
+ */
+struct IOptimizer
+{
+  virtual ~IOptimizer() = default;
+  /**
+   * @brief Run optimization
+   *
+   */
+  virtual void optimize() = 0;
+};
+
+} // namespace backend
+} // namespace onert
+
+#endif // __ONERT_BACKEND_I_OPTIMIZER_H__