diff --git a/src/main/java/com/onnoff/onnoff/apiPayload/code/status/ErrorStatus.java b/src/main/java/com/onnoff/onnoff/apiPayload/code/status/ErrorStatus.java
index 463ef50..2b605bd 100644
--- a/src/main/java/com/onnoff/onnoff/apiPayload/code/status/ErrorStatus.java
+++ b/src/main/java/com/onnoff/onnoff/apiPayload/code/status/ErrorStatus.java
@@ -34,6 +34,7 @@ public enum ErrorStatus implements BaseErrorCode {
 
     // 회고 답변 관련 에러
     ANSWER_NOT_FOUND(HttpStatus.BAD_REQUEST, "ANSWER4001", "해당하는 회고 답변이 없습니다."),
+    ANSWER_EXIST(HttpStatus.BAD_REQUEST, "ANSWER4002", "이미 해당 질문으로 작성된 회고 답변이 있습니다."),
 
     // 이모티콘 관련 에러
     EMOTICON_NOT_FOUND(HttpStatus.BAD_REQUEST, "EMOTICON4001", "해당하는 이모티콘이 없습니다."),
diff --git a/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/Memoir.java b/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/Memoir.java
index bb45994..7c4badf 100644
--- a/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/Memoir.java
+++ b/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/Memoir.java
@@ -43,12 +43,4 @@ public void setEmoticon(Emoticon emoticon) {
     public void setIsBookmarked(Boolean isBookmarked) {
         this.isBookmarked = isBookmarked;
     }
-
-    public void setUser(User user) {
-        this.user = user;
-    }
-
-    public void setMemoirAnswerList(List<MemoirAnswer> memoirAnswerList) {
-        this.memoirAnswerList = memoirAnswerList;
-    }
 }
diff --git a/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/MemoirAnswer.java b/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/MemoirAnswer.java
index 6fc56a0..13e21b3 100644
--- a/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/MemoirAnswer.java
+++ b/src/main/java/com/onnoff/onnoff/domain/off/memoir/entity/MemoirAnswer.java
@@ -29,4 +29,9 @@ public class MemoirAnswer extends BaseEntity {
     public void setAnswer(String answer) {
         this.answer = answer;
     }
+
+    public void setMemoir(Memoir memoir) {
+        this.memoir = memoir;
+        memoir.getMemoirAnswerList().add(this);
+    }
 }
diff --git a/src/main/java/com/onnoff/onnoff/domain/off/memoir/service/MemoirServiceImpl.java b/src/main/java/com/onnoff/onnoff/domain/off/memoir/service/MemoirServiceImpl.java
index e6d4181..c4dfb4c 100644
--- a/src/main/java/com/onnoff/onnoff/domain/off/memoir/service/MemoirServiceImpl.java
+++ b/src/main/java/com/onnoff/onnoff/domain/off/memoir/service/MemoirServiceImpl.java
@@ -37,6 +37,7 @@ public class MemoirServiceImpl implements MemoirService {
     @Transactional
     public Memoir writeMemoir(MemoirRequestDTO.MemoirWriteDTO request) {
         User user = UserContext.getUser();
+
         if (memoirRepository.findByUserAndDate(user, request.getDate()).isPresent()) {
             throw new MemoirHandler(ErrorStatus.MEMOIR_EXIST);
         }
@@ -45,20 +46,29 @@ public Memoir writeMemoir(MemoirRequestDTO.MemoirWriteDTO request) {
                 .date(request.getDate())
                 .emoticon(emoticonRepository.findById(request.getEmoticonId()).orElseThrow(() -> new MemoirHandler(ErrorStatus.EMOTICON_NOT_FOUND)))
                 .isBookmarked(false)
+                .user(user)
+                .memoirAnswerList(new ArrayList<>())
                 .build();
 
-        List<MemoirAnswer> newMemoirAnswerList = request.getMemoirAnswerList().stream()
-                .map(memoirAnswer -> MemoirAnswer.builder()
-                        .answer(memoirAnswer.getAnswer().trim())
-                        .memoirQuestion(memoirQuestionRepository.findById(memoirAnswer.getQuestionId()).orElseThrow(() -> new MemoirHandler(ErrorStatus.QUESTION_NOT_FOUND)))
-                        .memoir(newMemoir)
-                        .build())
-                .collect(Collectors.toList());
+        memoirRepository.save(newMemoir);
+
+        for (MemoirRequestDTO.MemoirAnswerDTO memoirAnswer : request.getMemoirAnswerList()) {
+            MemoirQuestion memoirQuestion = memoirQuestionRepository.findById(memoirAnswer.getQuestionId()).orElseThrow(() -> new MemoirHandler(ErrorStatus.QUESTION_NOT_FOUND));
 
-        newMemoir.setUser(user);
-        newMemoir.setMemoirAnswerList(newMemoirAnswerList);
+            if (memoirAnswerRepository.findByMemoirAndMemoirQuestion(newMemoir, memoirQuestion).isPresent()) {
+                throw new MemoirHandler(ErrorStatus.ANSWER_EXIST);
+            }
+
+            MemoirAnswer newMemoirAnswer = MemoirAnswer.builder()
+                    .answer(memoirAnswer.getAnswer().trim())
+                    .memoirQuestion(memoirQuestion)
+                    .build();
+
+            newMemoirAnswer.setMemoir(newMemoir);
+            memoirAnswerRepository.save(newMemoirAnswer);
+        }
 
-        return memoirRepository.save(newMemoir);
+        return newMemoir;
     }
 
     @Override