diff --git a/fine_tune.py b/fine_tune.py
index 17d091408..38b1962f6 100644
--- a/fine_tune.py
+++ b/fine_tune.py
@@ -335,10 +335,10 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
         for m in training_models:
             m.train()
-            if (args.optimizer_type.lower().endswith("schedulefree")):
-                optimizer.train()
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(*training_models):
                 with torch.no_grad():
@@ -409,6 +409,9 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
                     lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/sdxl_train.py b/sdxl_train.py
index 2590d36c1..09ca438f9 100644
--- a/sdxl_train.py
+++ b/sdxl_train.py
@@ -509,10 +509,10 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
         for m in training_models:
             m.train()
-            if (args.optimizer_type.lower().endswith("schedulefree")):
-                optimizer.train()
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(*training_models):
                 if "latents" in batch and batch["latents"] is not None:
@@ -640,6 +640,9 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
                     lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/sdxl_train_control_net_lllite.py b/sdxl_train_control_net_lllite.py
index 6cbb4741b..056f197f4 100644
--- a/sdxl_train_control_net_lllite.py
+++ b/sdxl_train_control_net_lllite.py
@@ -292,13 +292,14 @@ def train(args):
         unet, optimizer, train_dataloader, lr_scheduler = accelerator.prepare(unet, optimizer, train_dataloader, lr_scheduler)
 
     if args.gradient_checkpointing:
-        unet.train()  # according to TI example in Diffusers, train is required -> これオリジナルのU-Netしたので本当は外せる
         if (args.optimizer_type.lower().endswith("schedulefree")):
             optimizer.train()
+        unet.train()  # according to TI example in Diffusers, train is required -> これオリジナルのU-Netしたので本当は外せる
+
     else:
-        unet.eval()
         if (args.optimizer_type.lower().endswith("schedulefree")):
             optimizer.eval()
+        unet.eval()
 
     # TextEncoderの出力をキャッシュするときにはCPUへ移動する
     if args.cache_text_encoder_outputs:
@@ -397,6 +398,8 @@ def remove_model(old_ckpt_name):
         current_epoch.value = epoch + 1
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(unet):
                 with torch.no_grad():
@@ -492,6 +495,9 @@ def remove_model(old_ckpt_name):
                     lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/sdxl_train_control_net_lllite_old.py b/sdxl_train_control_net_lllite_old.py
index bb48fcb14..30240dd38 100644
--- a/sdxl_train_control_net_lllite_old.py
+++ b/sdxl_train_control_net_lllite_old.py
@@ -366,6 +366,8 @@ def remove_model(old_ckpt_name):
         network.on_epoch_start()  # train()
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(network):
                 with torch.no_grad():
@@ -462,6 +464,9 @@ def remove_model(old_ckpt_name):
                     lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/train_controlnet.py b/train_controlnet.py
index 6b71799dc..849e467b7 100644
--- a/train_controlnet.py
+++ b/train_controlnet.py
@@ -398,6 +398,8 @@ def remove_model(old_ckpt_name):
         current_epoch.value = epoch + 1
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(controlnet):
                 with torch.no_grad():
@@ -477,6 +479,9 @@ def remove_model(old_ckpt_name):
                 lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/train_db.py b/train_db.py
index ad55d6ce0..1f3ffd2cb 100644
--- a/train_db.py
+++ b/train_db.py
@@ -315,13 +315,13 @@ def train(args):
 
         # 指定したステップ数までText Encoderを学習する：epoch最初の状態
         unet.train()
-        if (args.optimizer_type.lower().endswith("schedulefree")):
-            optimizer.train()
         # train==True is required to enable gradient_checkpointing
         if args.gradient_checkpointing or global_step < args.stop_text_encoder_training:
             text_encoder.train()
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             # 指定したステップ数でText Encoderの学習を止める
             if global_step == args.stop_text_encoder_training:
@@ -403,6 +403,9 @@ def train(args):
                     lr_scheduler.step()
                 optimizer.zero_grad(set_to_none=True)
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)
diff --git a/train_network.py b/train_network.py
index e7db8168c..fe491d880 100644
--- a/train_network.py
+++ b/train_network.py
@@ -455,9 +455,10 @@ def train(self, args):
 
         if args.gradient_checkpointing:
             # according to TI example in Diffusers, train is required
-            unet.train()
             if (args.optimizer_type.lower().endswith("schedulefree")):
                 optimizer.train()
+            unet.train()
+
             for t_enc in text_encoders:
                 t_enc.train()
 
@@ -466,6 +467,8 @@ def train(self, args):
                     t_enc.text_model.embeddings.requires_grad_(True)
 
         else:
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
             unet.eval()
             for t_enc in text_encoders:
                 t_enc.eval()
@@ -814,6 +817,8 @@ def remove_model(old_ckpt_name):
             accelerator.unwrap_model(network).on_epoch_start(text_encoder, unet)
 
             for step, batch in enumerate(train_dataloader):
+                if (args.optimizer_type.lower().endswith("schedulefree")):
+                    optimizer.train()
                 current_step.value = global_step
                 with accelerator.accumulate(training_model):
                     on_step_start(text_encoder, unet)
@@ -931,6 +936,9 @@ def remove_model(old_ckpt_name):
                 else:
                     keys_scaled, mean_norm, maximum_norm = None, None, None
 
+                if (args.optimizer_type.lower().endswith("schedulefree")):
+                    optimizer.eval()
+
                 # Checks if the accelerator has performed an optimization step behind the scenes
                 if accelerator.sync_gradients:
                     progress_bar.update(1)
diff --git a/train_textual_inversion.py b/train_textual_inversion.py
index 4adbc642f..bd90a4e5b 100644
--- a/train_textual_inversion.py
+++ b/train_textual_inversion.py
@@ -462,8 +462,12 @@ def train(self, args):
         unet.to(accelerator.device, dtype=weight_dtype)
         if args.gradient_checkpointing:  # according to TI example in Diffusers, train is required
             # TODO U-Netをオリジナルに置き換えたのでいらないはずなので、後で確認して消す
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             unet.train()
         else:
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
             unet.eval()
 
         if not cache_latents:  # キャッシュしない場合はVAEを使うのでVAEを準備する
@@ -567,6 +571,8 @@ def remove_model(old_ckpt_name):
             loss_total = 0
 
             for step, batch in enumerate(train_dataloader):
+                if (args.optimizer_type.lower().endswith("schedulefree")):
+                    optimizer.train()
                 current_step.value = global_step
                 with accelerator.accumulate(text_encoders[0]):
                     with torch.no_grad():
@@ -637,6 +643,9 @@ def remove_model(old_ckpt_name):
                                 index_no_updates
                             ]
 
+                if (args.optimizer_type.lower().endswith("schedulefree")):
+                    optimizer.eval()
+
                 # Checks if the accelerator has performed an optimization step behind the scenes
                 if accelerator.sync_gradients:
                     progress_bar.update(1)
diff --git a/train_textual_inversion_XTI.py b/train_textual_inversion_XTI.py
index 701fd1467..712af33ec 100644
--- a/train_textual_inversion_XTI.py
+++ b/train_textual_inversion_XTI.py
@@ -447,6 +447,8 @@ def remove_model(old_ckpt_name):
         loss_total = 0
 
         for step, batch in enumerate(train_dataloader):
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.train()
             current_step.value = global_step
             with accelerator.accumulate(text_encoder):
                 with torch.no_grad():
@@ -515,6 +517,9 @@ def remove_model(old_ckpt_name):
                         index_no_updates
                     ]
 
+            if (args.optimizer_type.lower().endswith("schedulefree")):
+                optimizer.eval()
+
             # Checks if the accelerator has performed an optimization step behind the scenes
             if accelerator.sync_gradients:
                 progress_bar.update(1)