diff --git a/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java b/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
index e18d0e8..08ee709 100644
--- a/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
+++ b/src/main/java/kr/re/etri/autoflow/controllers/MinioAttachmentController.java
@@ -79,7 +79,7 @@ public class MinioAttachmentController {
         return ResponseEntity.ok(page);
     }
 
-    @Operation(summary = "첨부파일 삭제")
+    @Operation(summary = "첨부파일 삭제 (MinIO 포함)")
     @DeleteMapping("/{id}")
     public ResponseEntity<Void> delete(
             @Parameter(description = "첨부파일 ID", required = true)
diff --git a/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java b/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
index cb6ce1c..0110fac 100644
--- a/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
+++ b/src/main/java/kr/re/etri/autoflow/service/MinioAttachmentService.java
@@ -2,6 +2,7 @@ package kr.re.etri.autoflow.service;
 
 import io.minio.MinioClient;
 import io.minio.PutObjectArgs;
+import io.minio.RemoveObjectArgs;
 import jakarta.transaction.Transactional;
 import kr.re.etri.autoflow.entity.MinioAttachmentEntity;
 import kr.re.etri.autoflow.payload.request.BaseSearchRequest;
@@ -229,12 +230,31 @@ public class MinioAttachmentService {
     /**
      * 삭제
      */
+    @Transactional
     public boolean delete(Long id) {
-        if (!minioAttachmentRepository.existsById(id)) {
+        Optional<MinioAttachmentEntity> attachmentOpt = minioAttachmentRepository.findById(id);
+        if (attachmentOpt.isEmpty()) {
+            return false;
+        }
+
+        MinioAttachmentEntity attachment = attachmentOpt.get();
+        try {
+            // MinIO 파일 삭제
+            minioClient.removeObject(
+                    RemoveObjectArgs.builder()
+                            .bucket(bucketName)
+                            .object(attachment.getStoragePath())
+                            .build()
+            );
+
+            // DB에서 삭제
+            minioAttachmentRepository.deleteById(id);
+            return true;
+
+        } catch (Exception e) {
+            log.error("MinIO 파일 삭제 실패: " + attachment.getStoragePath(), e);
             return false;
         }
-        minioAttachmentRepository.deleteById(id);
-        return true;
     }
 
     /**