diff --git a/runtime/onert/core/include/ir/operation/Permute.h b/runtime/onert/core/include/ir/operation/Permute.h
index 10f09b9a03b..4866e9d1613 100644
--- a/runtime/onert/core/include/ir/operation/Permute.h
+++ b/runtime/onert/core/include/ir/operation/Permute.h
@@ -34,28 +34,32 @@ namespace ir
 namespace operation
 {
 
+/**
+ * @brief Class to represent Permute operation
+ * @note  Permute operation reorders the dimensions of a tensor.
+ *
+ *        This operation is virtual operation, which is not used on real model, but used internally.
+ *        It was introduced to support various model layout (NHWC, NCHW, etc) and backend layout.
+ *        But currently, model layout and backend layout are always same as NHWC.
+ *        So this operation is used for below cases.
+ *        1) Handle model output buffer's special case
+ *          1-1) Model output is comes from model constant
+ *          1-2) Model output is comes from model input
+ *          1-3) Model output shares tensor with other model output(s)
+ *        2) Handle shared tensor between different backend
+ *
+ *        Q) Why name is still 'Permute'?
+ *        A) It is handled as copy operation on compile phase,
+ *           but it can be permute operation if output buffer layout is changed by API call
+ */
 class Permute : public Operation
 {
-public:
-  enum class Type
-  {
-    NHWC_TO_NCHW,
-    NCHW_TO_NHWC,
-    COPY
-  };
-
 public:
   void accept(OperationVisitor &v) const override;
   OpCode opcode() const final { return OpCode::Permute; }
 
 public:
-  Permute(const OperandIndex &input, const OperandIndex &output, Type type);
-
-public:
-  Type getPermuteType() const { return _type; }
-
-private:
-  Type _type;
+  Permute(const OperandIndex &input, const OperandIndex &output);
 };
 
 } // namespace operation
diff --git a/runtime/onert/core/src/compiler/pass/ConstantOutputPass.cc b/runtime/onert/core/src/compiler/pass/ConstantOutputPass.cc
index 1448de47354..0e961c62316 100644
--- a/runtime/onert/core/src/compiler/pass/ConstantOutputPass.cc
+++ b/runtime/onert/core/src/compiler/pass/ConstantOutputPass.cc
@@ -41,7 +41,7 @@ void ConstantOutputPass::callback(const ir::OperandIndex &ind, ir::Operand &obj)
   obj.info().setAsNonConst();
 
   using ir::operation::Permute;
-  auto permute_obj = std::make_unique<Permute>(permute_input_ind, ind, Permute::Type::COPY);
+  auto permute_obj = std::make_unique<Permute>(permute_input_ind, ind);
   auto permute_ind = _graph.operations().push(std::move(permute_obj));
 
   permute_input_obj.insertUse(permute_ind);
diff --git a/runtime/onert/core/src/compiler/pass/OddOutputPass.cc b/runtime/onert/core/src/compiler/pass/OddOutputPass.cc
index e2b3f6111ed..5aabd2aa202 100644
--- a/runtime/onert/core/src/compiler/pass/OddOutputPass.cc
+++ b/runtime/onert/core/src/compiler/pass/OddOutputPass.cc
@@ -71,7 +71,7 @@ ir::OperandIndex OddOutputPass::insertPermute(ir::OperandIndex ind)
   auto &output_obj = _graph.operands().at(output_ind);
 
   using ir::operation::Permute;
-  auto permute_obj = std::make_unique<Permute>(ind, output_ind, Permute::Type::COPY);
+  auto permute_obj = std::make_unique<Permute>(ind, output_ind);
   auto permute_ind = _graph.operations().push(std::move(permute_obj));
 
   output_obj.setDef(permute_ind);
diff --git a/runtime/onert/core/src/compiler/pass/PermutationInsertionPass.cc b/runtime/onert/core/src/compiler/pass/PermutationInsertionPass.cc
index 586e97f9686..d49b88c6800 100644
--- a/runtime/onert/core/src/compiler/pass/PermutationInsertionPass.cc
+++ b/runtime/onert/core/src/compiler/pass/PermutationInsertionPass.cc
@@ -154,8 +154,7 @@ ir::OperationIndex PermutationInsertionPass::insertPermute(const ir::OperandInde
 
   // Insert permute operation to the graph
   using Permute = ir::operation::Permute;
-  auto insert_node =
-    std::make_unique<Permute>(operand_index, out_operand_index, Permute::Type::COPY);
+  auto insert_node = std::make_unique<Permute>(operand_index, out_operand_index);
 
   auto node_index = _graph.operations().push(std::move(insert_node));
 
diff --git a/runtime/onert/core/src/ir/OperationDumper.cc b/runtime/onert/core/src/ir/OperationDumper.cc
index 5aa4693adaf..e0f28795b9d 100644
--- a/runtime/onert/core/src/ir/OperationDumper.cc
+++ b/runtime/onert/core/src/ir/OperationDumper.cc
@@ -268,20 +268,8 @@ void OperationDumper::visit(const Pad &node)
 void OperationDumper::visit(const Permute &node)
 {
   std::string permute_type = "Unknown";
-  switch (node.getPermuteType())
-  {
-    case Permute::Type::COPY:
-      permute_type = "Copy";
-      break;
-    case Permute::Type::NHWC_TO_NCHW:
-      permute_type = "NHWC to NCHW";
-      break;
-    case Permute::Type::NCHW_TO_NHWC:
-      permute_type = "NCHW to NHWC";
-      break;
-  }
 
-  VERBOSE(LIR) << "* Permute(" + permute_type + ")" << std::endl;
+  VERBOSE(LIR) << "* " << node.name() << std::endl;
   VERBOSE(LIR) << "  - Inputs : Input(" << node.getInputs().at(0) << ")" << std::endl;
   VERBOSE(LIR) << "  - Output : Output(" << node.getOutputs().at(0) << ")" << std::endl;
 }
diff --git a/runtime/onert/core/src/ir/operation/Permute.cc b/runtime/onert/core/src/ir/operation/Permute.cc
index 813fbaf30ad..77ec42125c7 100644
--- a/runtime/onert/core/src/ir/operation/Permute.cc
+++ b/runtime/onert/core/src/ir/operation/Permute.cc
@@ -26,8 +26,8 @@ namespace operation
 
 void Permute::accept(OperationVisitor &v) const { v.visit(*this); }
 
-Permute::Permute(const OperandIndex &input, const OperandIndex &output, Type type)
-  : Operation{OperandConstraint::createExact(1u)}, _type{type}
+Permute::Permute(const OperandIndex &input, const OperandIndex &output)
+  : Operation{OperandConstraint::createExact(1u)}
 {
   setInputs({input});
   setOutputs({output});
diff --git a/runtime/onert/core/src/ir/train/operation/Permute.cc b/runtime/onert/core/src/ir/train/operation/Permute.cc
index adc23aa49b7..b1dfcec0336 100644
--- a/runtime/onert/core/src/ir/train/operation/Permute.cc
+++ b/runtime/onert/core/src/ir/train/operation/Permute.cc
@@ -38,8 +38,7 @@ void Permute::accept(OperationVisitor &v) const { v.visit(*this); }
 void Permute::accept(TrainableOperationVisitor &v) const { v.visit(*this); }
 
 Permute::Permute(const OperationType &operation)
-  : OperationType{operation.getInputs().at(0), operation.getOutputs().at(0),
-                  operation.getPermuteType()}
+  : OperationType{operation.getInputs().at(0), operation.getOutputs().at(0)}
 {
   // DO NOTHING
 }
diff --git a/runtime/onert/core/src/ir/train/operation/UntrainableOperation.test.cc b/runtime/onert/core/src/ir/train/operation/UntrainableOperation.test.cc
index e3472ec51e9..4a6267b0a34 100644
--- a/runtime/onert/core/src/ir/train/operation/UntrainableOperation.test.cc
+++ b/runtime/onert/core/src/ir/train/operation/UntrainableOperation.test.cc
@@ -332,7 +332,7 @@ operation::Pad generatePad()
 
 operation::Permute generatePermute()
 {
-  return operation::Permute{OperandIndex{1}, OperandIndex{0}, operation::Permute::Type::COPY};
+  return operation::Permute{OperandIndex{1}, OperandIndex{0}};
 }
 
 operation::Pool2D generatePool2D()