diff --git a/src/main/java/org/sopt/diary/api/DiaryController.java b/src/main/java/org/sopt/diary/api/DiaryController.java
index a83f19f..573fefe 100644
--- a/src/main/java/org/sopt/diary/api/DiaryController.java
+++ b/src/main/java/org/sopt/diary/api/DiaryController.java
@@ -4,10 +4,7 @@
 import org.sopt.diary.service.DiaryService;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-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.*;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -51,11 +48,21 @@ ResponseEntity<DiaryListResponse> getDiaryList(){
         // (2) Client 와 협약한 interface 로 변환
         List<DiaryResponse> diaryResponseList = new ArrayList<>();
         for (Diary diary : diaries) {
-            diaryResponseList.add(new DiaryResponse(diary.getId(), diary.getName()));
+            diaryResponseList.add(new DiaryResponse(diary.getId(), diary.getTitle()));
         }
 
         return ResponseEntity.ok(new DiaryListResponse(diaryResponseList));
     }
 
+    @GetMapping("/luckybicky/diaries/{diaryId}")
+    ResponseEntity<DiaryResponse> getDiary(@PathVariable long diaryId) {
+        Diary diary = diaryService.getDiaryDetailById(diaryId);
+        if(diary == null) {
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+
+        return ResponseEntity.ok(new DiaryResponse(diary.getId(), diary.getTitle(), diary.getContent(), diary.getCreatedAt()));
+    }
+
 
 }
diff --git a/src/main/java/org/sopt/diary/api/DiaryResponse.java b/src/main/java/org/sopt/diary/api/DiaryResponse.java
index 1488541..9dd161b 100644
--- a/src/main/java/org/sopt/diary/api/DiaryResponse.java
+++ b/src/main/java/org/sopt/diary/api/DiaryResponse.java
@@ -2,27 +2,50 @@
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
 @JsonInclude(JsonInclude.Include.NON_NULL) // null인 필드는 포함하지 않음
 public class DiaryResponse {
     private final long id;
-    private String name;
+    private String title;
+    private String content;
+    private String createdAt;
 
     // id만 반환하는 생성자
     public DiaryResponse(long id) {
         this.id = id;
     }
 
-    // id와 name을 모두 반환하는 생성자
-    public DiaryResponse(long id, String name) {
+    // id와 title 을 모두 반환하는 생성자
+    public DiaryResponse(long id, String title) {
         this.id = id;
-        this.name = name;
+        this.title = title;
+    }
+
+    // id, title, content, createdAt 을 모두 반환하는 생성자
+    public DiaryResponse(long id, String title, String content, LocalDateTime createdAt) {
+        this.id = id;
+        this.title = title;
+        this.content = content;
+
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
+        this.createdAt = createdAt.format(formatter);
     }
 
     public long getId() {
         return id;
     }
 
-    public String getName() {
-        return name;
+    public String getTitle() {
+        return title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public String getCreatedAt() {
+        return createdAt;
     }
 }
diff --git a/src/main/java/org/sopt/diary/repository/DiaryEntity.java b/src/main/java/org/sopt/diary/repository/DiaryEntity.java
index 62cfca4..42b18e4 100644
--- a/src/main/java/org/sopt/diary/repository/DiaryEntity.java
+++ b/src/main/java/org/sopt/diary/repository/DiaryEntity.java
@@ -30,12 +30,8 @@ public class DiaryEntity {
     @Column
     public LocalDateTime updatedAt;
 
-
-
     // 생성자
-    public DiaryEntity() {
-
-    }
+    public DiaryEntity() { }
 
     public DiaryEntity(final String title) {
         this.title = title;
@@ -44,17 +40,14 @@ public DiaryEntity(final String title) {
     public DiaryEntity(String title, String content) {
         this.title = title;
         this.content = content;
+        this.createdAt = LocalDateTime.now();
+        this.updatedAt = LocalDateTime.now();
     }
 
-    public Long getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getContent() {
-        return content;
-    }
+    // Getters
+    public Long getId() { return id; }
+    public String getTitle() { return title; }
+    public String getContent() { return content; }
+    public LocalDateTime getCreatedAt() { return createdAt; }
+    public LocalDateTime getUpdatedAt() { return updatedAt; }
 }
diff --git a/src/main/java/org/sopt/diary/service/Diary.java b/src/main/java/org/sopt/diary/service/Diary.java
index 8a39151..47af321 100644
--- a/src/main/java/org/sopt/diary/service/Diary.java
+++ b/src/main/java/org/sopt/diary/service/Diary.java
@@ -1,22 +1,41 @@
 package org.sopt.diary.service;
 
+import java.time.LocalDateTime;
+
 /*
 Diary 관련 비즈니스 로직을 정의한 서비스 클래스
  */
 public class Diary {
     private final long id;
-    private final String name;
+    private final String title;
+    private String content;
+    private LocalDateTime createdAt;
+
+    public Diary(long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
 
-    public Diary(long id, String name) {
+    public Diary(long id, String title, String content, LocalDateTime createdAt) {
         this.id = id;
-        this.name = name;
+        this.title = title;
+        this.content = content;
+        this.createdAt = createdAt;
     }
 
     public long getId() {
         return id;
     }
 
-    public String getName() {
-        return name;
+    public String getTitle() {
+        return title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
     }
 }
diff --git a/src/main/java/org/sopt/diary/service/DiaryService.java b/src/main/java/org/sopt/diary/service/DiaryService.java
index 8633394..bb4d89b 100644
--- a/src/main/java/org/sopt/diary/service/DiaryService.java
+++ b/src/main/java/org/sopt/diary/service/DiaryService.java
@@ -51,4 +51,10 @@ public List<Diary> getDiaries() {
         return diaries;
     }
 
+    public Diary getDiaryDetailById(Long id) {
+        DiaryEntity diaryEntity = diaryRepository.findById(id).orElse(null);
+        return diaryEntity != null
+                ? new Diary(diaryEntity.getId(), diaryEntity.getTitle(), diaryEntity.getContent(), diaryEntity.getCreatedAt())
+                : null;
+    }
 }