diff --git a/pyEdgeEval/evaluators/sbd.py b/pyEdgeEval/evaluators/sbd.py
index b84f30f..087fbac 100644
--- a/pyEdgeEval/evaluators/sbd.py
+++ b/pyEdgeEval/evaluators/sbd.py
@@ -48,6 +48,7 @@ def __init__(
         split: str = "val",
         cls_dir: str = "cls",
         inst_dir: str = "inst",
+        pred_suffix=None,
         **kwargs,
     ):
         self.dataset_root = dataset_root
@@ -65,6 +66,10 @@ def __init__(
             inst_dir,
         )
 
+        if pred_suffix is not None:
+            print_log(f"changed suffix to {pred_suffix}")
+            self.PRED_SUFFIX = pred_suffix
+
         # we can try to load some sample names
         try:
             self.set_sample_names()
diff --git a/pyEdgeEval/helpers/evaluate_sbd.py b/pyEdgeEval/helpers/evaluate_sbd.py
index 84f98ff..3378e5f 100644
--- a/pyEdgeEval/helpers/evaluate_sbd.py
+++ b/pyEdgeEval/helpers/evaluate_sbd.py
@@ -34,6 +34,12 @@ def parse_args():
         default="inst_orig",
         help="directory name for instance labels",
     )
+    parser.add_argument(
+        "--pred-suffix",
+        type=str,
+        default=".png",
+        help="suffix for predicted images",
+    )
     parser.add_argument(
         "--output-path",
         type=str,
@@ -81,6 +87,7 @@ def evaluate(
     pred_path: str,
     cls_dir: str,
     inst_dir: str,
+    pred_suffix: str,
     output_path: str,
     categories: str,
     apply_thinning: bool,
@@ -160,6 +167,7 @@ def evaluate(
     logger.info(f"nms:        \t{apply_nms}")
     logger.info(f"cls_dir:    \t{cls_dir}")
     logger.info(f"inst_dir:   \t{inst_dir}")
+    logger.info(f"pred_suffix:\t{pred_suffix}")
     print("\n\n")
 
     # initialize evaluator
@@ -168,6 +176,7 @@ def evaluate(
         pred_root=pred_path,
         cls_dir=cls_dir,
         inst_dir=inst_dir,
+        pred_suffix=pred_suffix,
     )
     if evaluator.sample_names is None:
         # load custom sample names
@@ -204,6 +213,7 @@ def evaluate_sbd():
         pred_path=args.pred_path,
         cls_dir=args.cls_dir,
         inst_dir=args.inst_dir,
+        pred_suffix=args.pred_suffix,
         output_path=args.output_path,
         categories=args.categories,
         apply_thinning=apply_thinning,
diff --git a/pyEdgeEval/info.py b/pyEdgeEval/info.py
index bc2eb3f..fdfa95c 100644
--- a/pyEdgeEval/info.py
+++ b/pyEdgeEval/info.py
@@ -2,7 +2,7 @@
 
 """Information about this library"""
 
-__version__ = "0.2.2"
+__version__ = "0.2.3"
 __author__ = "haruishi43"
 __email__ = "haruyaishikawa@keio.jp"
 __description__ = "Python Edge Evaluation Tools"