diff --git a/src/main/kotlin/dev/sunabak0/akiyadego/domain/User.kt b/src/main/kotlin/dev/sunabak0/akiyadego/domain/User.kt
new file mode 100644
index 0000000..1f21528
--- /dev/null
+++ b/src/main/kotlin/dev/sunabak0/akiyadego/domain/User.kt
@@ -0,0 +1,49 @@
+package dev.sunabak0.akiyadego.domain
+
+import dev.sunabak0.akiyadego.openapi.generated.model.Post
+
+/**
+ * ユーザ
+ *
+ * @property id
+ * @property uuid
+ * @property name
+ * @property email
+ * @property password
+ * @property createdAt
+ * @property posts
+ * @constructor Create empty User
+ */
+data class User(
+    val id: Int,
+    val uuid: String,
+    val name: String,
+    val email: String,
+    val password: String,
+    val createdAt: String,
+    val posts: List<Post>,
+) {
+    /**
+     *  Factoryメソッド
+     */
+    companion object {
+        /**
+         * Validation 有り
+         *
+         */
+        fun new(
+            id: Int,
+            uuid: String,
+            name: String,
+            email: String,
+            password: String,
+            createdAt: String,
+            posts: List<Post>,
+        ): Any {
+            if (name.isEmpty()) {
+                return IllegalArgumentException("名前が１文字未満です")
+            }
+            return User(id, uuid, name, email, password, createdAt, posts)
+        }
+    }
+}
diff --git a/src/test/kotlin/dev/sunabak0/akiyadego/domain/UserTest.kt b/src/test/kotlin/dev/sunabak0/akiyadego/domain/UserTest.kt
new file mode 100644
index 0000000..9616fc5
--- /dev/null
+++ b/src/test/kotlin/dev/sunabak0/akiyadego/domain/UserTest.kt
@@ -0,0 +1,27 @@
+package dev.sunabak0.akiyadego.domain
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+
+class UserTest {
+    @Test
+    fun `ユーザの名前の文字数が違反していたユーザの生成に失敗する`() {
+        /**
+         * given:
+         */
+
+        /**
+         * when:
+         */
+
+        /**
+         * then:
+         * - 名前を検査
+         */
+        val user = assertThrows<IllegalArgumentException> {
+            User.new(1, "uuid", "", "sample@com", "password", "20230123-12:00:00", listOf())
+        }
+        assertEquals(user.message, "名前が入力されていません")
+    }
+}