diff --git a/train_network.py b/train_network.py
index f2fd2009..14084b67 100644
--- a/train_network.py
+++ b/train_network.py
@@ -148,6 +148,20 @@ def train(args):
     # モデルに xformers とか memory efficient attention を組み込む
     train_util.replace_unet_modules(unet, args.mem_eff_attn, args.xformers)
 
+    # prepare network
+    import sys
+
+    sys.path.append(os.path.dirname(__file__))
+    print("import network module:", args.network_module)
+    network_module = importlib.import_module(args.network_module)
+
+    if args.base_modules is not None:
+        for module_path in args.base_modules:
+            print("merging module: %s"%module_path)
+            module, weights_sd = network_module.create_network_from_weights(args.base_modules_weight, module_path, vae, text_encoder, unet, for_inference=True)
+            module.merge_to(text_encoder, unet, weights_sd, weight_dtype, "cpu")
+        print("all modules merged: %s"%", ".join(args.base_modules))
+
     # 学習を準備する
     if cache_latents:
         vae.to(accelerator.device, dtype=weight_dtype)
@@ -162,13 +176,6 @@ def train(args):
 
         accelerator.wait_for_everyone()
 
-    # prepare network
-    import sys
-
-    sys.path.append(os.path.dirname(__file__))
-    print("import network module:", args.network_module)
-    network_module = importlib.import_module(args.network_module)
-
     net_kwargs = {}
     if args.network_args is not None:
         for net_arg in args.network_args:
@@ -770,6 +777,16 @@ def setup_parser() -> argparse.ArgumentParser:
         action="store_true",
         help="automatically determine dim (rank) from network_weights / dim (rank)をnetwork_weightsで指定した重みから自動で決定する",
     )
+    parser.add_argument(
+        "--base_modules",
+        type=str, default=None, nargs="*",
+        help="base modules for differential learning / 差分学習用のベースモデル",
+    )
+    parser.add_argument(
+        "--base_modules_weight",
+        type=float, default=1, 
+        help="weight of base modules for differential learning / 差分学習用のベースモデルの比重",
+    )
 
     return parser