diff --git a/service/src/main/kotlin/com/sangdol/roomescape/admin/business/AdminService.kt b/service/src/main/kotlin/com/sangdol/roomescape/admin/business/AdminService.kt
index 2c13e94b..cb1c02fb 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/admin/business/AdminService.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/admin/business/AdminService.kt
@@ -1,7 +1,7 @@
 package com.sangdol.roomescape.admin.business
 
-import com.sangdol.roomescape.admin.business.dto.AdminLoginCredentials
-import com.sangdol.roomescape.admin.business.dto.toCredentials
+import com.sangdol.roomescape.admin.dto.AdminLoginCredentials
+import com.sangdol.roomescape.admin.mapper.toCredentials
 import com.sangdol.roomescape.admin.exception.AdminErrorCode
 import com.sangdol.roomescape.admin.exception.AdminException
 import com.sangdol.roomescape.admin.infrastructure.persistence.AdminRepository
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/admin/business/dto/AdminLoginDTO.kt b/service/src/main/kotlin/com/sangdol/roomescape/admin/dto/AdminLoginDTO.kt
similarity index 69%
rename from service/src/main/kotlin/com/sangdol/roomescape/admin/business/dto/AdminLoginDTO.kt
rename to service/src/main/kotlin/com/sangdol/roomescape/admin/dto/AdminLoginDTO.kt
index d9d6c4f7..aa81c332 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/admin/business/dto/AdminLoginDTO.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/admin/dto/AdminLoginDTO.kt
@@ -1,6 +1,5 @@
-package com.sangdol.roomescape.admin.business.dto
+package com.sangdol.roomescape.admin.dto
 
-import com.sangdol.roomescape.admin.infrastructure.persistence.AdminEntity
 import com.sangdol.roomescape.admin.infrastructure.persistence.AdminPermissionLevel
 import com.sangdol.roomescape.admin.infrastructure.persistence.AdminType
 import com.sangdol.roomescape.auth.web.LoginCredentials
@@ -22,18 +21,9 @@ data class AdminLoginCredentials(
     )
 }
 
-fun AdminEntity.toCredentials() = AdminLoginCredentials(
-    id = this.id,
-    password = this.password,
-    name = this.name,
-    type = this.type,
-    storeId = this.storeId,
-    permissionLevel = this.permissionLevel
-)
-
 data class AdminLoginSuccessResponse(
     override val accessToken: String,
     override val name: String,
     val type: AdminType,
     val storeId: Long?,
-) : LoginSuccessResponse()
\ No newline at end of file
+) : LoginSuccessResponse()
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/admin/mapper/AdminMappingExtensions.kt b/service/src/main/kotlin/com/sangdol/roomescape/admin/mapper/AdminMappingExtensions.kt
new file mode 100644
index 00000000..8341d624
--- /dev/null
+++ b/service/src/main/kotlin/com/sangdol/roomescape/admin/mapper/AdminMappingExtensions.kt
@@ -0,0 +1,13 @@
+package com.sangdol.roomescape.admin.mapper
+
+import com.sangdol.roomescape.admin.dto.AdminLoginCredentials
+import com.sangdol.roomescape.admin.infrastructure.persistence.AdminEntity
+
+fun AdminEntity.toCredentials() = AdminLoginCredentials(
+    id = this.id,
+    password = this.password,
+    name = this.name,
+    type = this.type,
+    storeId = this.storeId,
+    permissionLevel = this.permissionLevel
+)