diff --git a/api/src/main/java/com/sponus/sponusbe/domain/bookmark/exception/BookmarkErrorCode.java b/api/src/main/java/com/sponus/sponusbe/domain/bookmark/exception/BookmarkErrorCode.java
index 9a1ebdbe..3034ce36 100644
--- a/api/src/main/java/com/sponus/sponusbe/domain/bookmark/exception/BookmarkErrorCode.java
+++ b/api/src/main/java/com/sponus/sponusbe/domain/bookmark/exception/BookmarkErrorCode.java
@@ -12,7 +12,8 @@
 @AllArgsConstructor
 public enum BookmarkErrorCode implements BaseErrorCode {
 
-	BOOKMARK_ERROR(HttpStatus.BAD_REQUEST, "BMK4000", "북마크 관련 에러");
+	BOOKMARK_ERROR(HttpStatus.BAD_REQUEST, "BMK4000", "북마크 관련 에러"),
+	CANNOT_BOOKMARK_TO_SELF(HttpStatus.BAD_REQUEST, "PROP4011", "본인에게는 북마크할 수 없습니다.");
 
 	private final HttpStatus httpStatus;
 	private final String code;
diff --git a/api/src/main/java/com/sponus/sponusbe/domain/bookmark/service/BookmarkService.java b/api/src/main/java/com/sponus/sponusbe/domain/bookmark/service/BookmarkService.java
index ed01acaf..0d72649d 100644
--- a/api/src/main/java/com/sponus/sponusbe/domain/bookmark/service/BookmarkService.java
+++ b/api/src/main/java/com/sponus/sponusbe/domain/bookmark/service/BookmarkService.java
@@ -29,7 +29,7 @@ public class BookmarkService {
 	public BookmarkToggleResponse bookmarkToggle(Organization organization, BookmarkToggleRequest request) {
 
 		if (organization.getId().equals(request.target()))
-			throw new BookmarkException(BookmarkErrorCode.BOOKMARK_ERROR);
+			throw new BookmarkException(BookmarkErrorCode.CANNOT_BOOKMARK_TO_SELF);
 
 		final Organization target = organizationRepository.findById(request.target())
 			.orElseThrow(() -> new OrganizationException(OrganizationErrorCode.ORGANIZATION_NOT_FOUND));
diff --git a/api/src/main/java/com/sponus/sponusbe/domain/propose/exception/ProposeErrorCode.java b/api/src/main/java/com/sponus/sponusbe/domain/propose/exception/ProposeErrorCode.java
index 46f38ab0..1669bd65 100644
--- a/api/src/main/java/com/sponus/sponusbe/domain/propose/exception/ProposeErrorCode.java
+++ b/api/src/main/java/com/sponus/sponusbe/domain/propose/exception/ProposeErrorCode.java
@@ -15,6 +15,7 @@ public enum ProposeErrorCode implements BaseErrorCode {
 	INVALID_PROPOSE_STATUS(HttpStatus.BAD_REQUEST, "PROP4005", "유효하지 않은 제안 상태입니다."),
 	PROPOSE_LIMIT_ERROR(HttpStatus.CONFLICT, "PROP4009", "하루 제안 5회 초과하였습니다."),
 	PROFILE_NOT_COMPLETED(HttpStatus.BAD_REQUEST, "PROP4010", "프로필이 작성되지 않았습니다."),
+	CANNOT_PROPOSE_TO_SELF(HttpStatus.BAD_REQUEST, "PROP4011", "본인에게는 제안할 수 없습니다."),
 	PROPOSE_NOT_FOUND(HttpStatus.NOT_FOUND, "PROP4040", "해당 제안이 존재하지 않습니다.");
 
 	private final HttpStatus httpStatus;
diff --git a/api/src/main/java/com/sponus/sponusbe/domain/propose/service/ProposeService.java b/api/src/main/java/com/sponus/sponusbe/domain/propose/service/ProposeService.java
index 7dc7819d..4faa7a3d 100644
--- a/api/src/main/java/com/sponus/sponusbe/domain/propose/service/ProposeService.java
+++ b/api/src/main/java/com/sponus/sponusbe/domain/propose/service/ProposeService.java
@@ -31,14 +31,14 @@ public class ProposeService {
 	public ProposeCreateResponse createPropose(Organization organization, ProposeCreateRequest request) {
 
 		if (organization.getId().equals(request.target()))
-			throw new ProposeException(ProposeErrorCode.PROPOSE_ERROR);
+			throw new ProposeException(ProposeErrorCode.CANNOT_PROPOSE_TO_SELF);
 
 		final Organization target = organizationRepository.findById(request.target())
 			.orElseThrow(() -> new OrganizationException(OrganizationErrorCode.ORGANIZATION_NOT_FOUND));
 
 		if (organization.getImageUrl() == null || organization.getImageUrl().isEmpty())
 			throw new ProposeException(ProposeErrorCode.PROFILE_NOT_COMPLETED);
-		
+
 		final Long count = proposeRepository.countProposesByOrganizationToday(organization,
 			LocalDateTime.now().toLocalDate().atStartOfDay());