diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 1d81a01..45e070b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -2,7 +2,7 @@ name: CI / CD
 
 on:
   push:
-    branches: [main]
+    branches: [feat/#19-access-token-reissue]
 
 jobs:
   CI:
diff --git a/src/main/java/com/gcp/domain/discord/repository/DiscordUserRepository.java b/src/main/java/com/gcp/domain/discord/repository/DiscordUserRepository.java
index fa35fb1..53f6f3a 100644
--- a/src/main/java/com/gcp/domain/discord/repository/DiscordUserRepository.java
+++ b/src/main/java/com/gcp/domain/discord/repository/DiscordUserRepository.java
@@ -32,6 +32,4 @@ Optional<String> findAccessTokenByUserIdAndGuildId(@Param("userId") String userI
     @Query("SELECT u.accessTokenExpiration FROM DiscordUser u WHERE u.userId = :userId AND u.guildId = :guildId")
     Optional<LocalDateTime> findAccessTokenExpByUserIdAndGuildId(@Param("userId") String userId,
                                                                  @Param("guildId") String guildId);
-
-
 }
diff --git a/src/main/java/com/gcp/domain/discord/service/DiscordUserService.java b/src/main/java/com/gcp/domain/discord/service/DiscordUserService.java
index 06ec7d7..5dfa5f3 100644
--- a/src/main/java/com/gcp/domain/discord/service/DiscordUserService.java
+++ b/src/main/java/com/gcp/domain/discord/service/DiscordUserService.java
@@ -3,12 +3,35 @@
 import com.gcp.domain.discord.entity.DiscordUser;
 import com.gcp.domain.discord.repository.DiscordUserRepository;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.springframework.security.oauth2.core.OAuth2TokenIntrospectionClaimNames.CLIENT_ID;
+import static org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames.CLIENT_SECRET;
 
 @Service
 @RequiredArgsConstructor
+@Slf4j
 public class DiscordUserService {
     private final DiscordUserRepository discordUserRepository;
+    private final RestTemplate restTemplate;
+
+    @Value("${GOOGLE_CLIENT_ID}")
+    private String googleClientId;
+
+    @Value("${GOOGLE_CLIENT_SECRET}")
+    private String googleClientSecret;
 
 
     public boolean insertDiscordUser(String userId, String userName, String guildId, String guildName){
@@ -19,4 +42,35 @@ public boolean insertDiscordUser(String userId, String userName, String guildId,
         }
         return false;
     }
+
+    public Map<String, Object> refreshAccessToken(String refreshToken) {
+        String url = "https://oauth2.googleapis.com/token";
+        log.info("{}", refreshToken);
+
+        MultiValueMap<String, String> body = new LinkedMultiValueMap<>();
+        body.add("client_id", googleClientId);
+        body.add("client_secret", googleClientSecret);
+        body.add("refresh_token", refreshToken);
+        body.add("grant_type", "refresh_token");
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
+
+        HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(body, headers);
+        ResponseEntity<Map> response = restTemplate.postForEntity(url, request, Map.class);
+
+        if (response.getStatusCode().is2xxSuccessful()) {
+            Map<String, Object> result = new HashMap<>();
+            Map<String, Object> bodyMap = response.getBody();
+
+            result.put("access_token", bodyMap.get("access_token"));
+            result.put("expires_in", bodyMap.get("expires_in"));  // 보통 초 단위 (ex: 3599)
+            result.put("scope", bodyMap.get("scope"));
+            result.put("token_type", bodyMap.get("token_type"));
+
+            return result;
+        } else {
+            throw new RuntimeException("리프레시 토큰으로 액세스 토큰 재발급 실패");
+        }
+    }
 }
diff --git a/src/main/java/com/gcp/domain/gcp/service/GcpService.java b/src/main/java/com/gcp/domain/gcp/service/GcpService.java
index 50fdf2b..bee2ce0 100644
--- a/src/main/java/com/gcp/domain/gcp/service/GcpService.java
+++ b/src/main/java/com/gcp/domain/gcp/service/GcpService.java
@@ -4,12 +4,12 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.gcp.domain.discord.entity.DiscordUser;
 import com.gcp.domain.discord.repository.DiscordUserRepository;
+import com.gcp.domain.discord.service.DiscordUserService;
 import com.gcp.domain.gcp.dto.ProjectZoneDto;
 import com.gcp.domain.gcp.repository.GcpProjectRepository;
 
 import com.gcp.domain.gcp.util.GcpImageUtil;
-import com.google.auth.oauth2.GoogleCredentials;
-import com.google.cloud.compute.v1.Project;
+import com.gcp.domain.oauth2.util.TokenEncryptConverter;
 import lombok.RequiredArgsConstructor;
 import lombok.SneakyThrows;
 import lombok.extern.slf4j.Slf4j;
@@ -18,18 +18,19 @@
 import org.json.JSONObject;
 import org.springframework.http.*;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
 
 import java.io.IOException;
+import java.time.LocalDateTime;
 import java.util.*;
 
-import static org.json.XMLTokener.entity;
-
 @Service
 @RequiredArgsConstructor
 @Slf4j
+@Transactional
 public class GcpService {
 
     private final RestTemplate restTemplate = new RestTemplate();
@@ -39,6 +40,8 @@ public class GcpService {
     private static final String PROJECT_ID = "sincere-elixir-464606-j1";
     private final GcpImageUtil gcpImageUtil;
 
+    private final DiscordUserService discordUserService;
+
 
     public String startVM(String userId, String guildId, String vmName) {
         try {
@@ -129,7 +132,7 @@ public List<String> getVmLogs(String userId, String guildId, String vmName) {
                     "resource.type=\"gce_instance\" AND resource.labels.instance_id=\"%s\" AND severity>=ERROR",
                     vmId
             );
-            
+
             Map<String, Object> body = Map.of(
                     "resourceNames", List.of("projects/sincere-elixir-464606-j1"),
                     "pageSize", 50,
@@ -213,8 +216,16 @@ public List<Map<String, String>> getVmList(String userId, String guildId) {
     public List<String> getProjectIds(String userId, String guildId) {
         try {
             String url = "https://cloudresourcemanager.googleapis.com/v1/projects";
+            LocalDateTime tokenExp = discordUserRepository.findAccessTokenExpByUserIdAndGuildId(userId, guildId).orElseThrow();
+            if(tokenExp.isBefore(LocalDateTime.now())){
+                DiscordUser discordUser = discordUserRepository.findByUserIdAndGuildId(userId, guildId).orElseThrow();
+                Map<String, Object> reissued = discordUserService.refreshAccessToken(discordUser.getGoogleRefreshToken());
+                discordUser.updateAccessToken((String) reissued.get("access_token"));
+                discordUser.updateAccessTokenExpiration(LocalDateTime.now().plusSeconds((Integer) reissued.get("expires_in")));
+            }
             String accessToken = discordUserRepository.findAccessTokenByUserIdAndGuildId(userId, guildId).orElseThrow();
 
+
             HttpHeaders headers = new HttpHeaders();
             headers.setBearerAuth(accessToken);
             headers.setContentType(MediaType.APPLICATION_JSON);