diff --git a/src/main/java/org/cotato/csquiz/api/member/controller/MemberController.java b/src/main/java/org/cotato/csquiz/api/member/controller/MemberController.java
index 47217db7..8b1b9873 100644
--- a/src/main/java/org/cotato/csquiz/api/member/controller/MemberController.java
+++ b/src/main/java/org/cotato/csquiz/api/member/controller/MemberController.java
@@ -1,13 +1,16 @@
 package org.cotato.csquiz.api.member.controller;
 
+import io.swagger.v3.oas.annotations.Operation;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.cotato.csquiz.api.admin.dto.MemberInfoResponse;
 import org.cotato.csquiz.api.member.dto.MemberMyPageInfoResponse;
 import org.cotato.csquiz.api.member.dto.UpdatePasswordRequest;
+import org.cotato.csquiz.api.member.dto.UpdatePhoneNumberRequest;
 import org.cotato.csquiz.common.config.jwt.JwtTokenProvider;
 import org.cotato.csquiz.domain.auth.service.MemberService;
+import org.springframework.context.annotation.Description;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
@@ -42,6 +45,16 @@ public ResponseEntity<Void> updatePassword(@RequestHeader("Authorization") Strin
         return ResponseEntity.noContent().build();
     }
 
+    @Operation(summary = "멤버 전화번호 수정", description = "멤버 전화번호 수정하기")
+    @PatchMapping("/phone-number")
+    public ResponseEntity<Void> updatePhoneNumber(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestBody @Valid UpdatePhoneNumberRequest request) {
+        String accessToken = jwtTokenProvider.getBearer(authorizationHeader);
+        memberService.updatePhoneNumber(accessToken,request.phoneNumber());
+        return ResponseEntity.noContent().build();
+    }
+
     @GetMapping("/{memberId}/mypage")
     public ResponseEntity<MemberMyPageInfoResponse> findMyPageInfo(@PathVariable("memberId") Long memberId) {
         return ResponseEntity.ok().body(memberService.findMyPageInfo(memberId));
diff --git a/src/main/java/org/cotato/csquiz/api/member/dto/UpdatePhoneNumberRequest.java b/src/main/java/org/cotato/csquiz/api/member/dto/UpdatePhoneNumberRequest.java
new file mode 100644
index 00000000..eedc67f3
--- /dev/null
+++ b/src/main/java/org/cotato/csquiz/api/member/dto/UpdatePhoneNumberRequest.java
@@ -0,0 +1,11 @@
+package org.cotato.csquiz.api.member.dto;
+
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
+
+public record UpdatePhoneNumberRequest(
+        @NotNull(message = "전화번호를 입력해주세요.")
+        @Size(min = 11, max = 11, message = "'-'없이 11자리의 전화번호를 입력해주세요.")
+        String phoneNumber
+) {
+}
diff --git a/src/main/java/org/cotato/csquiz/domain/auth/entity/Member.java b/src/main/java/org/cotato/csquiz/domain/auth/entity/Member.java
index 9b5befca..4dc0c4c5 100644
--- a/src/main/java/org/cotato/csquiz/domain/auth/entity/Member.java
+++ b/src/main/java/org/cotato/csquiz/domain/auth/entity/Member.java
@@ -75,6 +75,10 @@ public void updateGeneration(Integer passedGenerationNumber) {
         this.passedGenerationNumber = passedGenerationNumber;
     }
 
+    public void updatePhoneNumber(String phoneNumber) {
+        this.phoneNumber = phoneNumber;
+    }
+
     public void updatePosition(MemberPosition position) {
         this.position = position;
     }
diff --git a/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java b/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
index 62d303af..ea466e33 100644
--- a/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
+++ b/src/main/java/org/cotato/csquiz/domain/auth/service/MemberService.java
@@ -6,6 +6,7 @@
 import org.cotato.csquiz.api.admin.dto.MemberInfoResponse;
 import org.cotato.csquiz.api.member.dto.MemberInfo;
 import org.cotato.csquiz.api.member.dto.MemberMyPageInfoResponse;
+import org.cotato.csquiz.api.member.dto.UpdatePhoneNumberRequest;
 import org.cotato.csquiz.common.config.jwt.JwtTokenProvider;
 import org.cotato.csquiz.domain.auth.entity.Member;
 import org.cotato.csquiz.common.error.exception.AppException;
@@ -60,6 +61,16 @@ private void validateIsSameBefore(String originPassword, String newPassword) {
         }
     }
 
+    @Transactional
+    public void updatePhoneNumber(String accessToken, String phoneNumber) {
+        Long memberId = jwtTokenProvider.getMemberId(accessToken);
+        Member findMember = memberRepository.findById(memberId)
+                .orElseThrow(() -> new EntityNotFoundException("해당 회원을 찾을 수 없습니다."));
+
+        String encryptedPhoneNumber = encryptService.encryptPhoneNumber(phoneNumber);
+        findMember.updatePhoneNumber(encryptedPhoneNumber);
+    }
+
     public MemberMyPageInfoResponse findMyPageInfo(Long memberId) {
         Member findMember = memberRepository.findById(memberId)
                 .orElseThrow(() -> new EntityNotFoundException("해당 회원을 찾을 수 없습니다."));