diff --git a/package.json b/package.json
index eb104cb..4fa2216 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "shinnyang",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "",
   "author": {
     "name": "Medici",
diff --git a/src/mails/dtos/mails.response.dto.ts b/src/mails/dtos/mails.response.dto.ts
index 474439c..dd5c4e4 100644
--- a/src/mails/dtos/mails.response.dto.ts
+++ b/src/mails/dtos/mails.response.dto.ts
@@ -7,6 +7,10 @@ export class LetterFromMailResponseDTO {
   @IsUUID('all')
   id: string;
 
+  @ApiProperty()
+  @IsUUID('all')
+  mailId: string;
+
   @ApiProperty()
   @IsDate()
   createdAt: Date;
@@ -44,9 +48,14 @@ export class LetterFromMailResponseDTO {
   isRespond: boolean;
 
   constructor(
-    letter: Mail['letter'] & { replyLetterId: string | null; isRead: boolean },
+    letter: Mail['letter'] & {
+      replyLetterId: string | null;
+      isRead: boolean;
+      mailId: string;
+    },
   ) {
     this.id = letter.id;
+    this.mailId = letter.mailId;
     this.createdAt = letter.createdAt;
     this.updatedAt = letter.updatedAt;
     this.senderId = letter.senderId;
diff --git a/src/mails/mails.controller.ts b/src/mails/mails.controller.ts
index 7ad9704..e8273bb 100644
--- a/src/mails/mails.controller.ts
+++ b/src/mails/mails.controller.ts
@@ -1,6 +1,15 @@
 import { AccessGuard } from 'src/auth/guards/acess.guard';
 import { MailsService } from './mails.service';
-import { Body, Controller, Get, Post, Put, UseGuards } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  ParseUUIDPipe,
+  Post,
+  Put,
+  UseGuards,
+} from '@nestjs/common';
 import { AuthUser } from 'src/auth/decorators/auth-user.decorator';
 import {
   ApiBearerAuth,
@@ -29,6 +38,16 @@ export class MailsController {
   async getMyMails(@AuthUser() { id }) {
     return await this.mailsService.getMyMails(id);
   }
+  @Get(':mailId')
+  @ApiOkResponse({
+    type: [LetterFromMailResponseDTO],
+  })
+  async getMyMailById(
+    @AuthUser() { id },
+    @Param('mailId', ParseUUIDPipe) mailId: string,
+  ) {
+    return await this.mailsService.getMyMailById(id, mailId);
+  }
 
   @ApiOperation({
     summary: '편지 보관하기',
diff --git a/src/mails/mails.service.ts b/src/mails/mails.service.ts
index 087ce52..3e480fe 100644
--- a/src/mails/mails.service.ts
+++ b/src/mails/mails.service.ts
@@ -14,6 +14,27 @@ import { Letter } from 'src/letters/entities/letter.entity';
 export class MailsService {
   constructor(@InjectDataSource() private readonly dataSource: DataSource) {}
 
+  async getMyMailById(userId: string, mailId: string) {
+    const mail = await this.dataSource.getRepository(Mail).findOne({
+      where: {
+        id: mailId,
+        userId,
+      },
+      relations: {
+        letter: true,
+      },
+    });
+    if (!mail) {
+      throw new BadRequestException();
+    }
+    return new LetterFromMailResponseDTO({
+      ...mail.letter,
+      mailId,
+      isRead: mail.isRead,
+      replyLetterId: mail.replyLetterId,
+    });
+  }
+
   async getMyMails(userId: string) {
     const myMails = await this.dataSource.getRepository(Mail).find({
       where: {
@@ -27,6 +48,7 @@ export class MailsService {
       (mail) =>
         new LetterFromMailResponseDTO({
           ...mail.letter,
+          mailId: mail.id,
           isRead: mail.isRead,
           replyLetterId: mail.replyLetterId,
         }),