diff --git a/train_network.py b/train_network.py
index e148a92a..dd1fb748 100644
--- a/train_network.py
+++ b/train_network.py
@@ -197,6 +197,7 @@ def train(args):
     # dataloaderを準備する
     # DataLoaderのプロセス数：0はメインプロセスになる
     n_workers = min(args.max_data_loader_n_workers, os.cpu_count() - 1)  # cpu_count-1 ただし最大で指定された数まで
+    
     train_dataloader = torch.utils.data.DataLoader(
         train_dataset_group,
         batch_size=1,
@@ -509,6 +510,7 @@ def train(args):
 
     loss_list = []
     loss_total = 0.0
+    del train_dataset_group
     for epoch in range(num_train_epochs):
         if is_main_process:
             print(f"epoch {epoch+1}/{num_train_epochs}")