diff --git a/backend/application/api/src/main/kotlin/io/raemian/api/auth/controller/request/UpdateUserRequest.kt b/backend/application/api/src/main/kotlin/io/raemian/api/auth/controller/request/UpdateUserRequest.kt
index c48a2e50..6d795ad7 100644
--- a/backend/application/api/src/main/kotlin/io/raemian/api/auth/controller/request/UpdateUserRequest.kt
+++ b/backend/application/api/src/main/kotlin/io/raemian/api/auth/controller/request/UpdateUserRequest.kt
@@ -5,5 +5,10 @@ import java.time.LocalDate
 data class UpdateUserRequest(
     val nickname: String,
     val birth: LocalDate,
+)
+
+data class UpdateUserInfoRequest(
+    val nickname: String,
+    val birth: LocalDate,
     val username: String,
 )
diff --git a/backend/application/api/src/main/kotlin/io/raemian/api/user/controller/UserController.kt b/backend/application/api/src/main/kotlin/io/raemian/api/user/controller/UserController.kt
index 2399f3ac..571635e3 100644
--- a/backend/application/api/src/main/kotlin/io/raemian/api/user/controller/UserController.kt
+++ b/backend/application/api/src/main/kotlin/io/raemian/api/user/controller/UserController.kt
@@ -1,5 +1,6 @@
 package io.raemian.api.user.controller
 
+import io.raemian.api.auth.controller.request.UpdateUserInfoRequest
 import io.raemian.api.auth.controller.request.UpdateUserRequest
 import io.raemian.api.auth.domain.CurrentUser
 import io.raemian.api.lifemap.LifeMapService
@@ -31,20 +32,45 @@ class UserController(
 
     @Operation(summary = "유저 온보딩 이후 정보 업데이트 API")
     @PutMapping("/my")
-    fun update(
+    fun updateBaseInfo(
         @AuthenticationPrincipal currentUser: CurrentUser,
         @RequestBody updateUserRequest: UpdateUserRequest,
     ): ResponseEntity<Void> {
-        val isDuplicated = userService.isDuplicatedUsername(updateUserRequest.username)
+        userService.updateBaseInfo(
+            id = currentUser.id,
+            nickname = updateUserRequest.nickname,
+            birth = updateUserRequest.birth,
+        )
+
+        return ResponseEntity.ok().build()
+    }
+
+    @Operation(summary = "마이페이지 정보 업데이트 API")
+    @PutMapping("/users")
+    fun updateFromMy(
+        @AuthenticationPrincipal currentUser: CurrentUser,
+        @RequestBody updateUserInfoRequest: UpdateUserInfoRequest,
+    ): ResponseEntity<Void> {
+        val user = userService.getUserById(currentUser.id)
+        if (user.username == updateUserInfoRequest.username) {
+            userService.updateBaseInfo(
+                id = currentUser.id,
+                nickname = updateUserInfoRequest.nickname,
+                birth = updateUserInfoRequest.birth,
+            )
+            return ResponseEntity.ok().build()
+        }
+
+        val isDuplicated = userService.isDuplicatedUsername(updateUserInfoRequest.username)
         if (isDuplicated) {
             return ResponseEntity.status(409).build()
         }
 
         userService.update(
             id = currentUser.id,
-            nickname = updateUserRequest.nickname,
-            birth = updateUserRequest.birth,
-            username = updateUserRequest.username,
+            nickname = updateUserInfoRequest.nickname,
+            birth = updateUserInfoRequest.birth,
+            username = updateUserInfoRequest.username,
         )
 
         return ResponseEntity.ok().build()
diff --git a/backend/application/api/src/main/kotlin/io/raemian/api/user/service/UserService.kt b/backend/application/api/src/main/kotlin/io/raemian/api/user/service/UserService.kt
index 86cf897a..32e7d9ad 100644
--- a/backend/application/api/src/main/kotlin/io/raemian/api/user/service/UserService.kt
+++ b/backend/application/api/src/main/kotlin/io/raemian/api/user/service/UserService.kt
@@ -17,18 +17,30 @@ class UserService(
         return UserDTO.of(user)
     }
 
-    fun update(id: Long, nickname: String, birth: LocalDate, username: String): UserDTO {
+    fun updateBaseInfo(id: Long, nickname: String, birth: LocalDate): UserDTO {
         val user = userRepository.getById(id)
 
-        val updated = user.updateInfo(
+        val updated = user.updateBaseInfo(
             nickname = nickname,
             birth = birth,
-            username = username,
         )
 
         return UserDTO.of(userRepository.save(updated))
     }
 
+    fun update(id: Long, nickname: String, birth: LocalDate, username: String): UserDTO {
+        val user = userRepository.getById(id)
+
+        val updated = user
+            .updateBaseInfo(
+                nickname = nickname,
+                birth = birth,
+            )
+            .updateUsername(username)
+
+        return UserDTO.of(userRepository.save(updated))
+    }
+
     fun delete(id: Long) {
         userRepository.deleteById(id)
     }
diff --git a/backend/storage/db-core/src/main/kotlin/io/raemian/storage/db/core/user/User.kt b/backend/storage/db-core/src/main/kotlin/io/raemian/storage/db/core/user/User.kt
index 08cca9b7..7e6adee3 100644
--- a/backend/storage/db-core/src/main/kotlin/io/raemian/storage/db/core/user/User.kt
+++ b/backend/storage/db-core/src/main/kotlin/io/raemian/storage/db/core/user/User.kt
@@ -43,7 +43,7 @@ class User(
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     val id: Long? = null,
 ) : BaseEntity() {
-    fun updateInfo(nickname: String, birth: LocalDate, username: String): User {
+    fun updateBaseInfo(nickname: String, birth: LocalDate): User {
         return User(
             email = email,
             nickname = nickname,