diff --git a/src/main/java/com/sponus/sponusbe/domain/announcement/controller/AnnouncementController.java b/src/main/java/com/sponus/sponusbe/domain/announcement/controller/AnnouncementController.java
index f8803f31..6fcbc1ba 100644
--- a/src/main/java/com/sponus/sponusbe/domain/announcement/controller/AnnouncementController.java
+++ b/src/main/java/com/sponus/sponusbe/domain/announcement/controller/AnnouncementController.java
@@ -98,7 +98,7 @@ public ApiResponse<AnnouncementUpdateResponse> updateAnnouncement(
 		@AuthOrganization Organization authOrganization,
 		@PathVariable Long announcementId,
 		@RequestPart("request") @Valid AnnouncementUpdateRequest request,
-		@RequestPart(value = "images") @Valid List<MultipartFile> images
+		@RequestPart(value = "images", required = false) @Valid List<MultipartFile> images
 	) {
 		return ApiResponse.onSuccess(announcementService.updateAnnouncement(
 			authOrganization,
diff --git a/src/main/java/com/sponus/sponusbe/domain/announcement/dto/request/AnnouncementUpdateRequest.java b/src/main/java/com/sponus/sponusbe/domain/announcement/dto/request/AnnouncementUpdateRequest.java
index de87f380..391c79fb 100644
--- a/src/main/java/com/sponus/sponusbe/domain/announcement/dto/request/AnnouncementUpdateRequest.java
+++ b/src/main/java/com/sponus/sponusbe/domain/announcement/dto/request/AnnouncementUpdateRequest.java
@@ -1,39 +1,17 @@
 package com.sponus.sponusbe.domain.announcement.dto.request;
 
-import static com.sponus.sponusbe.domain.announcement.entity.enums.AnnouncementStatus.*;
-
-import com.sponus.sponusbe.domain.announcement.entity.Announcement;
 import com.sponus.sponusbe.domain.announcement.entity.enums.AnnouncementCategory;
 import com.sponus.sponusbe.domain.announcement.entity.enums.AnnouncementStatus;
 import com.sponus.sponusbe.domain.announcement.entity.enums.AnnouncementType;
-import com.sponus.sponusbe.domain.organization.entity.Organization;
 
-import jakarta.validation.constraints.NotBlank;
-import jakarta.validation.constraints.NotNull;
 import lombok.Builder;
 
 @Builder
 public record AnnouncementUpdateRequest(
-	@NotBlank(message = "[ERROR] 타이틀 입력은 필수 입니다.")
 	String title,
-	@NotNull(message = "[ERROR] 유형 입력은 필수 입니다.")
 	AnnouncementType type,
-	@NotNull(message = "[ERROR] 카테코리 입력은 필수 입니다.")
 	AnnouncementCategory category,
-	@NotBlank(message = "[ERROR] 내용 입력은 필수 입니다.")
 	String content,
-
 	AnnouncementStatus status
 ) {
-
-	public Announcement toEntity(Organization writer) {
-		return Announcement.builder()
-			.writer(writer)
-			.title(title)
-			.type(type)
-			.category(category)
-			.content(content)
-			.status(OPENED)
-			.build();
-	}
 }
diff --git a/src/main/java/com/sponus/sponusbe/domain/announcement/exception/AnnouncementErrorCode.java b/src/main/java/com/sponus/sponusbe/domain/announcement/exception/AnnouncementErrorCode.java
index f32a252b..a7600f13 100644
--- a/src/main/java/com/sponus/sponusbe/domain/announcement/exception/AnnouncementErrorCode.java
+++ b/src/main/java/com/sponus/sponusbe/domain/announcement/exception/AnnouncementErrorCode.java
@@ -14,7 +14,7 @@ public enum AnnouncementErrorCode implements BaseErrorCode {
 	ANNOUNCEMENT_ERROR(HttpStatus.BAD_REQUEST, "ANC4000", "공고 관련 에러"),
 	ANNOUNCEMENT_ALREADY_DELETED(HttpStatus.BAD_REQUEST, "ANC4001", "이미 삭제된 공지사항입니다."),
 	INVALID_ORGANIZATION(HttpStatus.BAD_REQUEST, "ANC4002", "해당 단체의 공고가 아닙니다."),
-	INVALID_ANNOUNCEMENT_STATUS(HttpStatus.BAD_REQUEST, "ANC4003", "해당 상태의 공고는 수정할 수 없습니다."),
+	CLOSED_ANNOUNCEMENT_STATUS(HttpStatus.BAD_REQUEST, "ANC4003", "마감된 공고는 수정할 수 없습니다."),
 	ANNOUNCEMENT_NOT_IN_PROGRESS(HttpStatus.BAD_REQUEST, "ANC4004", "진행 중인 공고가 아닙니다."),
 	ANNOUNCEMENT_NOT_FOUND(HttpStatus.NOT_FOUND, "ANC4040", "해당 공고가 존재하지 않습니다.");
 
diff --git a/src/main/java/com/sponus/sponusbe/domain/announcement/service/AnnouncementService.java b/src/main/java/com/sponus/sponusbe/domain/announcement/service/AnnouncementService.java
index 802c7e6d..f0c1d526 100644
--- a/src/main/java/com/sponus/sponusbe/domain/announcement/service/AnnouncementService.java
+++ b/src/main/java/com/sponus/sponusbe/domain/announcement/service/AnnouncementService.java
@@ -82,7 +82,7 @@ public AnnouncementUpdateResponse updateAnnouncement(
 			.orElseThrow(() -> new AnnouncementException(AnnouncementErrorCode.ANNOUNCEMENT_NOT_FOUND));
 
 		if (announcement.getStatus() != AnnouncementStatus.OPENED)
-			throw new AnnouncementException(AnnouncementErrorCode.INVALID_ANNOUNCEMENT_STATUS);
+			throw new AnnouncementException(AnnouncementErrorCode.CLOSED_ANNOUNCEMENT_STATUS);
 		if (!isOrganizationsAnnouncement(authOrganization.getId(), announcement))
 			throw new AnnouncementException(AnnouncementErrorCode.INVALID_ORGANIZATION);
 
@@ -93,7 +93,11 @@ public AnnouncementUpdateResponse updateAnnouncement(
 			request.content(),
 			request.status()
 		);
-		updateAnnouncementImages(announcement, images);
+
+		// 공고는 이미지가 필수이므로, 이미지가 없는 경우에는 업데이트하지 않음
+		if (images != null)
+			updateAnnouncementImages(announcement, images);
+
 		announcementRepository.save(announcement);
 		return AnnouncementUpdateResponse.from(announcement);
 	}