diff --git a/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/OrderDetail.java b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/OrderDetail.java
new file mode 100644
index 00000000..5d78a1ca
--- /dev/null
+++ b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/OrderDetail.java
@@ -0,0 +1,14 @@
+package com.example.pickingtdd.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class OrderDetail {
+
+    private Long orderDetailId;
+    private Long orderId;
+    private Sku sku;
+    private int amount;
+}
diff --git a/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/Sku.java b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/Sku.java
new file mode 100644
index 00000000..8cade341
--- /dev/null
+++ b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/entity/Sku.java
@@ -0,0 +1,4 @@
+package com.example.pickingtdd.entity;
+
+public class Sku {
+}
diff --git a/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailService.java b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailService.java
new file mode 100644
index 00000000..3505fe06
--- /dev/null
+++ b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailService.java
@@ -0,0 +1,8 @@
+package com.example.pickingtdd.service;
+
+import com.example.pickingtdd.entity.OrderDetail;
+
+public interface OrderDetailService {
+
+    OrderDetail createOrderDetail(OrderDetail orderDetail) throws Exception;
+}
diff --git a/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailServiceImpl.java b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailServiceImpl.java
new file mode 100644
index 00000000..2a8c1e70
--- /dev/null
+++ b/tdd_practice/pickingTDD/src/main/java/com/example/pickingtdd/service/OrderDetailServiceImpl.java
@@ -0,0 +1,12 @@
+package com.example.pickingtdd.service;
+
+import com.example.pickingtdd.entity.OrderDetail;
+import org.springframework.stereotype.Service;
+
+@Service
+public class OrderDetailServiceImpl implements OrderDetailService {
+    @Override
+    public OrderDetail createOrderDetail(OrderDetail orderDetail) {
+        return orderDetail;
+    }
+}
diff --git a/tdd_practice/pickingTDD/src/test/java/com/example/pickingtdd/service/OrderDetailServiceTests.java b/tdd_practice/pickingTDD/src/test/java/com/example/pickingtdd/service/OrderDetailServiceTests.java
index 779b8046..266c4175 100644
--- a/tdd_practice/pickingTDD/src/test/java/com/example/pickingtdd/service/OrderDetailServiceTests.java
+++ b/tdd_practice/pickingTDD/src/test/java/com/example/pickingtdd/service/OrderDetailServiceTests.java
@@ -1,4 +1,49 @@
 package com.example.pickingtdd.service;
 
+import com.example.pickingtdd.entity.OrderDetail;
+import com.example.pickingtdd.entity.Sku;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
 public class OrderDetailServiceTests {
+
+    @Autowired
+    OrderDetailService orderDetailService;
+
+    OrderDetail orderDetailSuccess;
+    OrderDetail orderDetailFail;
+
+    @BeforeEach
+    void setup() {
+        orderDetailSuccess = new OrderDetail();
+        orderDetailSuccess.setOrderDetailId(1L);
+        orderDetailSuccess.setOrderId(1L);
+        orderDetailSuccess.setSku(new Sku());
+        orderDetailSuccess.setAmount(10);
+
+        orderDetailFail = new OrderDetail();
+        orderDetailFail.setOrderDetailId(2L);
+    }
+
+    @Test
+    void createOrderDetail_success() {
+        OrderDetail orderDetail = new OrderDetail();
+
+        try {
+            orderDetail = orderDetailService.createOrderDetail(orderDetailSuccess);
+        } catch (Exception e) {
+            // do Something
+        }
+
+        assertEquals(1L, orderDetail.getOrderDetailId());
+        assertEquals(1L, orderDetail.getOrderId());
+        assertEquals(10, orderDetail.getAmount());
+    }
+
 }
diff --git a/tdd_practice/pickingTDD/todo.txt b/tdd_practice/pickingTDD/todo.txt
index 4121b2a4..b8ad2745 100644
--- a/tdd_practice/pickingTDD/todo.txt
+++ b/tdd_practice/pickingTDD/todo.txt
@@ -10,8 +10,8 @@ SKU
 ------- TO-DO -------
 [] Order validation 에 OrderDetail 검증 추가
 [] OrderDetail validation 추가
-[] OrderDetail 생성
 
+[v] OrderDetail 생성
 [v] Order.state => enum 변경
 [v] ORDER 검증
 [v] ORDER 생성