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diff --git a/runtimes/neurun/src/model/operation/Node.h b/runtimes/neurun/src/model/operation/Node.h
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+++ b/runtimes/neurun/src/model/operation/Node.h
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+/*
+ * Copyright (c) 2018 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 __NEURUN_MODEL_OPERATION_NODE_H__
+#define __NEURUN_MODEL_OPERATION_NODE_H__
+
+#include <memory>
+
+#include "model/operand/Object.h"
+#include "model/operand/IndexSet.h"
+#include "OperandConstraint.h"
+
+namespace neurun
+{
+namespace graph
+{
+namespace operation
+{
+class LowerInfo;
+} // namespace operation
+} // namespace graph
+} // namespace neurun
+
+namespace neurun
+{
+namespace model
+{
+namespace operation
+{
+
+struct NodeVisitor;
+
+class Node
+{
+public:
+  struct InitParam
+  {
+    uint32_t input_count;
+    const uint32_t *inputs;
+    uint32_t output_count;
+    const uint32_t *outputs;
+  };
+
+public:
+  Node(OperandConstraint input_constr);
+  virtual ~Node();
+
+public:
+  virtual void accept(NodeVisitor &&) const = 0;
+  virtual std::string getName() const = 0;
+
+public:
+  void replaceInput(const operand::Index &from, const operand::Index &to);
+  void replaceOutput(const operand::Index &from, const operand::Index &to);
+  const operand::IndexSet &getInputs() const { return _inputs; }
+  const operand::IndexSet &getOutputs() const { return _outputs; }
+  // It's for only input/output tensors but const data.
+  void setInputs(const operand::IndexSet &indexes);
+  void setOutputs(const operand::IndexSet &indexes);
+
+private:
+  operand::IndexSet _inputs;
+  operand::IndexSet _outputs;
+  OperandConstraint _input_constr;
+};
+
+} // namespace operation
+} // namespace model
+} // namespace neurun
+
+#endif // __NEURUN_MODEL_OPERATION_NODE_H__