diff --git a/src/main/java/com/backend/config/SecurityConfig.java b/src/main/java/com/backend/config/SecurityConfig.java
index b1f925e..d249ed9 100644
--- a/src/main/java/com/backend/config/SecurityConfig.java
+++ b/src/main/java/com/backend/config/SecurityConfig.java
@@ -62,6 +62,7 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
                                 .requestMatchers(mvcMatcherBuilder.pattern("/api/**")).permitAll()
                                 .requestMatchers(mvcMatcherBuilder.pattern("/mail/**")).permitAll()
                                 .requestMatchers(mvcMatcherBuilder.pattern("/s3/create")).permitAll()
+                                .requestMatchers(mvcMatcherBuilder.pattern("/sms")).permitAll()
                                 .anyRequest().authenticated())
                 .exceptionHandling()
                 .authenticationEntryPoint(entryPoint);
diff --git a/src/main/java/com/backend/domain/mail/controller/MailController.java b/src/main/java/com/backend/domain/mail/controller/MailController.java
index dbd7dae..5ec9015 100644
--- a/src/main/java/com/backend/domain/mail/controller/MailController.java
+++ b/src/main/java/com/backend/domain/mail/controller/MailController.java
@@ -1,14 +1,16 @@
 package com.backend.domain.mail.controller;
 
 import com.backend.domain.mail.dto.request.MailRequest;
+import com.backend.domain.mail.dto.request.SmsRequest;
 import com.backend.domain.mail.service.MailService;
+import com.backend.error.ErrorCode;
+import com.backend.error.exception.custom.BusinessException;
+import io.github.resilience4j.ratelimiter.annotation.RateLimiter;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequiredArgsConstructor
@@ -21,4 +23,17 @@ public class MailController {
     public ResponseEntity<Integer> sendCode(@Valid @RequestBody MailRequest emailRequest) {
         return ResponseEntity.ok(mailService.sendAuthenticationCode(emailRequest));
     }
+
+    @RateLimiter(name = "jedero", fallbackMethod = "rateLimiterFallback")
+    @GetMapping("/sms")
+    public ResponseEntity<Integer> sendSMS(@Valid @RequestBody SmsRequest smsRequest) {
+        int result = mailService.sendSMS(smsRequest);
+        return ResponseEntity.ok(result);
+    }
+
+    public ResponseEntity<String> rateLimiterFallback(Throwable t) {
+//        HttpHeaders responseHeaders = new HttpHeaders();
+//        responseHeaders.set("Retry-After", "10s");
+        throw new BusinessException(ErrorCode.TOO_MANY_SMS);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/backend/domain/mail/dto/request/SmsRequest.java b/src/main/java/com/backend/domain/mail/dto/request/SmsRequest.java
new file mode 100644
index 0000000..09e3768
--- /dev/null
+++ b/src/main/java/com/backend/domain/mail/dto/request/SmsRequest.java
@@ -0,0 +1,6 @@
+package com.backend.domain.mail.dto.request;
+
+import jakarta.validation.constraints.NotEmpty;
+
+public record SmsRequest(@NotEmpty String toNumber) {
+}
\ No newline at end of file
diff --git a/src/main/java/com/backend/domain/mail/service/MailService.java b/src/main/java/com/backend/domain/mail/service/MailService.java
index c178b3c..8a52347 100644
--- a/src/main/java/com/backend/domain/mail/service/MailService.java
+++ b/src/main/java/com/backend/domain/mail/service/MailService.java
@@ -1,21 +1,45 @@
 package com.backend.domain.mail.service;
 
 import com.backend.domain.mail.dto.request.MailRequest;
+import com.backend.domain.mail.dto.request.SmsRequest;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import net.nurigo.sdk.NurigoApp;
+import net.nurigo.sdk.message.model.Message;
+import net.nurigo.sdk.message.request.SingleMessageSendingRequest;
+import net.nurigo.sdk.message.response.SingleMessageSentResponse;
+import net.nurigo.sdk.message.service.DefaultMessageService;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.mail.SimpleMailMessage;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.stereotype.Service;
 
+import java.util.Random;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
 @Service
 @RequiredArgsConstructor
 @Slf4j
 public class MailService {
+
     private final JavaMailSender javaMailSender;
-    @Value("{mail.mail.username}")
+
+    private DefaultMessageService messageService;
+
+    @Value("${spring.mail.username}")
     private String username;
 
+    @Value("${coolsms.api.key}")
+    private String apiKey;
+
+    @Value("${coolsms.api.secret}")
+    private String apiSecret;
+
+    @Value("${coolsms.api.fromNumber}")
+    private String fromNumber;
+
+
     public int sendAuthenticationCode(MailRequest mailRequest) {
         int code = (int) (Math.random() * 900000) + 100000;
 
@@ -31,4 +55,23 @@ public int sendAuthenticationCode(MailRequest mailRequest) {
 
         return code;
     }
-}
+
+    public int sendSMS(SmsRequest smsRequest) {
+        Message message = new Message();
+        this.messageService = NurigoApp.INSTANCE.initialize(apiKey, apiSecret, "https://api.coolsms.co.kr");
+
+        Random rand = new Random();
+        String code = IntStream.range(0, 4)
+                .mapToObj(i -> Integer.toString(rand.nextInt(10)))
+                .collect(Collectors.joining());
+
+        message.setFrom(fromNumber);
+        message.setTo(smsRequest.toNumber());
+        message.setText("[제대로] 인증번호를 입력해주세요.\n인증번호: " + code);
+
+        SingleMessageSentResponse response = messageService.sendOne(new SingleMessageSendingRequest(message));
+        log.info("SMS 메세지 결과 = {}", response);
+
+        return Integer.parseInt(code);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/backend/error/ErrorCode.java b/src/main/java/com/backend/error/ErrorCode.java
index 5ee15b5..eaf3642 100644
--- a/src/main/java/com/backend/error/ErrorCode.java
+++ b/src/main/java/com/backend/error/ErrorCode.java
@@ -17,7 +17,8 @@ public enum ErrorCode {
     INVALID_GROUP_TYPE(BAD_REQUEST, "잘못된 그룹 종류입니다."),
     INVALID_PASSWORD(BAD_REQUEST, "잘못된 비밀번호입니다."),
     IMAGE_UPLOAD_FAIL(BAD_REQUEST, "이미지 업로드에 실패했습니다."),
-    INVALID_FILE(BAD_REQUEST, "잘못된 파일 형식입니다.");
+    INVALID_FILE(BAD_REQUEST, "잘못된 파일 형식입니다."),
+    TOO_MANY_SMS(TOO_MANY_REQUESTS, "짧은 시간에 너무 많은 요청을 보냈습니다. 1분 후에 재시도하세요.");
 
     private final int code;
     private final String message;