diff --git a/clokey-api/src/main/java/org/clokey/domain/auth/service/CustomOAuth2UserService.java b/clokey-api/src/main/java/org/clokey/domain/auth/service/CustomOAuth2UserService.java
index 4fc50d5e..106d9a67 100644
--- a/clokey-api/src/main/java/org/clokey/domain/auth/service/CustomOAuth2UserService.java
+++ b/clokey-api/src/main/java/org/clokey/domain/auth/service/CustomOAuth2UserService.java
@@ -18,6 +18,7 @@
 import org.springframework.security.oauth2.core.oidc.user.OidcUser;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
 
 @Slf4j
 @Service
@@ -57,6 +58,7 @@ public OidcUser loadUser(OidcUserRequest userRequest) throws OAuth2Authenticatio
 
             OauthProvider oauthProvider = OauthProvider.valueOf(provider.toUpperCase());
             OauthInfo oauthInfo = OauthInfo.createOauthInfo(oauthId, oauthProvider);
+            String resolvedEmail = resolveEmail(email, oauthId, oauthProvider);
 
             log.info("[OIDC] 회원 조회 시작 - Provider: {}, OAuthId: {}", provider, oauthId);
             Member member =
@@ -70,7 +72,7 @@ public OidcUser loadUser(OidcUserRequest userRequest) throws OAuth2Authenticatio
                                                 email);
                                         Member newMember =
                                                 Member.createMember(
-                                                        email,
+                                                        resolvedEmail,
                                                         uniqueUtil.generateRandomNickname(),
                                                         oauthInfo);
                                         memberRepository.save(newMember);
@@ -112,4 +114,23 @@ public OidcUser loadUser(OidcUserRequest userRequest) throws OAuth2Authenticatio
             throw new OAuth2AuthenticationException(oauth2Error, e);
         }
     }
+
+    private String resolveEmail(String email, String oauthId, OauthProvider oauthProvider) {
+        if (StringUtils.hasText(email)) {
+            return email;
+        }
+
+        String safeOauthId = oauthId.replaceAll("[^a-zA-Z0-9._-]", "_");
+        if (safeOauthId.length() > 80) {
+            safeOauthId = safeOauthId.substring(0, 80);
+        }
+        String fallbackEmail =
+                oauthProvider.name().toLowerCase() + "_" + safeOauthId + "@noemail.local";
+        log.warn(
+                "[OIDC] Email claim missing. Fallback email is used - Provider: {}, OAuthId: {}, FallbackEmail: {}",
+                oauthProvider,
+                oauthId,
+                fallbackEmail);
+        return fallbackEmail;
+    }
 }
diff --git a/clokey-api/src/main/resources/application-dev.yml b/clokey-api/src/main/resources/application-dev.yml
index 510844cb..5c844a16 100644
--- a/clokey-api/src/main/resources/application-dev.yml
+++ b/clokey-api/src/main/resources/application-dev.yml
@@ -57,6 +57,7 @@ spring:
             client-authentication-method: client_secret_post
             scope:
               - openid
+              - email
             provider: apple
         provider:
           kakao:
diff --git a/clokey-api/src/main/resources/application-local.yml b/clokey-api/src/main/resources/application-local.yml
index fdcf9a05..38e94c4b 100644
--- a/clokey-api/src/main/resources/application-local.yml
+++ b/clokey-api/src/main/resources/application-local.yml
@@ -57,6 +57,7 @@ spring:
             client-authentication-method: client_secret_post
             scope:
               - openid
+              - email
             provider: apple
         provider:
           kakao:
diff --git a/clokey-api/src/main/resources/application-prod.yml b/clokey-api/src/main/resources/application-prod.yml
index 61aaadff..14985f1c 100644
--- a/clokey-api/src/main/resources/application-prod.yml
+++ b/clokey-api/src/main/resources/application-prod.yml
@@ -57,6 +57,7 @@ spring:
             client-authentication-method: client_secret_post
             scope:
               - openid
+              - email
             provider: apple
         provider:
           kakao: