diff --git a/sdxl_train_network.py b/sdxl_train_network.py
index 1bd4cb74..306c0f0f 100644
--- a/sdxl_train_network.py
+++ b/sdxl_train_network.py
@@ -8,6 +8,7 @@ class SdxlNetworkTrainer(train_network.NetworkTrainer):
     def __init__(self):
         super().__init__()
         self.vae_scale_factor = sdxl_model_util.VAE_SCALE_FACTOR
+        self.sampling_warning_showed = False
 
     def assert_extra_args(self, args, train_dataset_group):
         super().assert_extra_args(args)
@@ -153,7 +154,9 @@ class SdxlNetworkTrainer(train_network.NetworkTrainer):
         return noise_pred
 
     def sample_images(self, accelerator, args, epoch, global_step, device, vae, tokenizer, text_encoder, unet):
-        print("sample_images is not implemented")
+        if not self.sampling_warning_showed:
+            print("sample_images is not implemented")
+            self.sampling_warning_showed = True
 
 
 def setup_parser() -> argparse.ArgumentParser: