diff --git a/mohou/trainer.py b/mohou/trainer.py
index 6d06064..9d6bc9a 100644
--- a/mohou/trainer.py
+++ b/mohou/trainer.py
@@ -8,7 +8,17 @@
 from datetime import datetime, timezone
 from enum import Enum
 from pathlib import Path
-from typing import Dict, Generic, Iterable, List, Optional, Tuple, Type, TypeVar
+from typing import (
+    Callable,
+    Dict,
+    Generic,
+    Iterable,
+    List,
+    Optional,
+    Tuple,
+    Type,
+    TypeVar,
+)
 
 import matplotlib.pyplot as plt
 import numpy as np
@@ -372,11 +382,11 @@ def train_lower(
     validate_loader: Iterable,
     config: TrainConfig = TrainConfig(),
     device: Optional[torch.device] = None,
+    is_stoppable: Optional[Callable[[TrainCache], None]] = None,
 ) -> None:
     r"""
     low-level train function that accepts train loader
     """
-
     log_package_version_info(logger, mohou)
     log_text_with_box(logger, "train log")
     logger.info("train start with config: {}".format(config))
@@ -432,6 +442,11 @@ def move_to_device(sample):
         logger.info("validate loss => {}".format(validate_ld_mean))
         tcache.update_and_save(model, train_ld_mean, validate_ld_mean, project_path)
 
+        if is_stoppable is not None:
+            if is_stoppable(tcache):
+                logger.info("meet stop criterion. exit from trainning session.")
+                return
+
 
 def train(
     project_path: Path,
@@ -439,6 +454,7 @@ def train(
     dataset: Dataset,
     config: TrainConfig = TrainConfig(),
     device: Optional[torch.device] = None,
+    is_stoppable: Optional[Callable[[TrainCache], None]] = None,
 ) -> None:
     r"""
     higher-level train function that auto create dataloader from the dataset
@@ -450,4 +466,12 @@ def train(
     validate_loader = DataLoader(
         dataset=dataset_validate, batch_size=config.batch_size, shuffle=True
     )
-    train_lower(project_path, tcache, train_loader, validate_loader, config=config, device=device)
+    train_lower(
+        project_path,
+        tcache,
+        train_loader,
+        validate_loader,
+        config=config,
+        device=device,
+        is_stoppable=is_stoppable,
+    )