diff --git a/upload.py b/upload.py
index 6247e3d..544dccc 100755
--- a/upload.py
+++ b/upload.py
@@ -14,10 +14,22 @@ load_dotenv()
 # .envファイルからCloudflare R2のエンドポイントを読み込む
 ENDPOINT = os.getenv('R2_ENDPOINT')
 
+def validate_environment():
+    """環境変数の確認"""
+    required_vars = [
+        'R2_ENDPOINT',
+        'R2_ACCESS_KEY_ID',
+        'R2_SECRET_ACCESS_KEY',
+        'R2_BUCKET_NAME',
+        'R2_CUSTOM_URL'
+    ]
+    
+    missing_vars = [var for var in required_vars if not os.getenv(var)]
+    if missing_vars:
+        raise ValueError(f"Missing required environment variables: {', '.join(missing_vars)}")
+
 def upload_to_r2(image_path):
     """
-    画像をCloudflare R2にアップロードする。
-
     Args:
         image_path (str): アップロードする画像のパス。
 
@@ -27,6 +39,8 @@ def upload_to_r2(image_path):
     """
 
     try:
+        validate_environment()
+
         # R2のクライアントを作成
         s3 = boto3.client(
             's3',
@@ -50,26 +64,31 @@ def upload_to_r2(image_path):
         # アップロードされた画像のURLを返す
         return f"{os.getenv('R2_CUSTOM_URL')}{random_filename}"
 
+    except ValueError as e:
+        print(f"Configuration error: {e}")
+        return None
+    except boto3.exceptions.BotoServerError as e:
+        print(f"R2 server error: {e}")
+        return None
+    except boto3.exceptions.ClientError as e:
+        print(f"R2 client error: {e}")
+        return None
     except Exception as e:
-        print(f"Error uploading image: {e}")
+        print(f"Unexpected error: {e}")
         return None
 
 if __name__ == '__main__':
-    parser = argparse.ArgumentParser(description='Upload an image to Cloudflare R2.')
-    parser.add_argument('--image-path', required=True, help='Path to the image file.')
+    parser = argparse.ArgumentParser(description='Upload images to Cloudflare R2.')
+    parser.add_argument('--images-path', nargs='+', required=True, help='Paths to image files.')
     args = parser.parse_args()
 
-    image_path = args.image_path
+    for image_path in args.images_path:
+        if not os.path.exists(image_path):
+            print(f"Error: Image not found at {image_path}. Skipping.")
+            continue
 
-    # 画像が存在するか確認
-    if not os.path.exists(image_path):
-        print(f"Error: Image not found at {image_path}")
-        exit(1)
-
-    # R2に画像をアップロード
-    image_url = upload_to_r2(image_path)
-
-    if image_url:
-        print(f"{image_url}")
-    else:
-        print("Image upload failed.")
\ No newline at end of file
+        image_url = upload_to_r2(image_path)
+        if image_url:
+            print(image_url)
+        else:
+            print(f"Image upload failed for {image_path}.")
\ No newline at end of file