diff --git a/src/main/kotlin/roomescape/auth/web/support/AuthInterceptor.kt b/src/main/kotlin/roomescape/auth/web/support/AuthInterceptor.kt
index a4f3742b..6901c384 100644
--- a/src/main/kotlin/roomescape/auth/web/support/AuthInterceptor.kt
+++ b/src/main/kotlin/roomescape/auth/web/support/AuthInterceptor.kt
@@ -16,6 +16,8 @@ import roomescape.member.infrastructure.persistence.MemberEntity
 
 private val log: KLogger = KotlinLogging.logger {}
 
+const val MDC_MEMBER_ID_KEY: String = "member_id"
+
 @Component
 class AuthInterceptor(
     private val memberFinder: MemberFinder,
@@ -42,7 +44,7 @@ class AuthInterceptor(
             throw AuthException(AuthErrorCode.ACCESS_DENIED)
         }
 
-        MDC.put("member_id", "${member.id}")
+        MDC.put(MDC_MEMBER_ID_KEY, "${member.id}")
         log.info { "[AuthInterceptor] 인증 완료. memberId=${member.id}, role=${member.role}" }
         return true
     }
@@ -51,7 +53,7 @@ class AuthInterceptor(
         try {
             val memberId = jwtHandler.getMemberIdFromToken(accessToken)
             return memberFinder.findById(memberId)
-                .also { MDC.put("member_id", "$memberId") }
+                .also { MDC.put(MDC_MEMBER_ID_KEY, "$memberId") }
         } catch (e: Exception) {
             log.info { "[AuthInterceptor] 회원 조회 실패. accessToken = $accessToken" }
             val errorCode = AuthErrorCode.MEMBER_NOT_FOUND
diff --git a/src/main/kotlin/roomescape/common/log/ApiLogMessageConverter.kt b/src/main/kotlin/roomescape/common/log/ApiLogMessageConverter.kt
index 7cf16685..ff3cec66 100644
--- a/src/main/kotlin/roomescape/common/log/ApiLogMessageConverter.kt
+++ b/src/main/kotlin/roomescape/common/log/ApiLogMessageConverter.kt
@@ -3,6 +3,7 @@ package roomescape.common.log
 import com.fasterxml.jackson.databind.ObjectMapper
 import jakarta.servlet.http.HttpServletRequest
 import org.slf4j.MDC
+import roomescape.auth.web.support.MDC_MEMBER_ID_KEY
 
 enum class LogType {
     INCOMING_HTTP_REQUEST,
@@ -33,7 +34,7 @@ class ApiLogMessageConverter(
         controllerPayload: Map<String, Any>,
     ): String {
         val payload: MutableMap<String, Any> = commonRequestPayload(LogType.CONTROLLER_INVOKED, request)
-        val memberId: Long? = MDC.get("member_id")?.toLong()
+        val memberId: Long? = MDC.get(MDC_MEMBER_ID_KEY)?.toLong()
         if (memberId != null) payload["member_id"] = memberId else payload["member_id"] = "NONE"
 
         payload.putAll(controllerPayload)
@@ -46,7 +47,7 @@ class ApiLogMessageConverter(
         payload["type"] = request.type
         payload["status_code"] = request.httpStatus
 
-        MDC.get("member_id")?.toLongOrNull()
+        MDC.get(MDC_MEMBER_ID_KEY)?.toLongOrNull()
             ?.let { payload["member_id"] = it }
             ?: run { payload["member_id"] = "NONE" }