diff --git a/test/test_synthesis_engine.py b/test/test_synthesis_engine.py
index 24e20da5f..ed9e891d5 100644
--- a/test/test_synthesis_engine.py
+++ b/test/test_synthesis_engine.py
@@ -109,6 +109,7 @@ def decode_mock(
 
 
 class MockCore:
+    default_sampling_rate = 24000
     yukarin_s_forward = Mock(side_effect=yukarin_s_mock)
     yukarin_sa_forward = Mock(side_effect=yukarin_sa_mock)
     decode_forward = Mock(side_effect=decode_mock)
diff --git a/test/test_synthesis_engine_base.py b/test/test_synthesis_engine_base.py
index 8202891b7..c49dcbe01 100644
--- a/test/test_synthesis_engine_base.py
+++ b/test/test_synthesis_engine_base.py
@@ -169,6 +169,7 @@ def create_mock_query(accent_phrases):
 
 
 class MockCore:
+    default_sampling_rate = 24000
     yukarin_s_forward = Mock(side_effect=yukarin_s_mock)
     yukarin_sa_forward = Mock(side_effect=yukarin_sa_mock)
     decode_forward = Mock(side_effect=decode_mock)
diff --git a/voicevox_engine/dev/synthesis_engine/mock.py b/voicevox_engine/dev/synthesis_engine/mock.py
index 9f49f5953..1b6c4abeb 100644
--- a/voicevox_engine/dev/synthesis_engine/mock.py
+++ b/voicevox_engine/dev/synthesis_engine/mock.py
@@ -27,7 +27,10 @@ def __init__(
 
         self._speakers = speakers
         self._supported_devices = supported_devices
-        self.default_sampling_rate = 24000
+
+    @property
+    def default_sampling_rate(self) -> int:
+        return 24000
 
     @property
     def speakers(self) -> str:
diff --git a/voicevox_engine/synthesis_engine/core_wrapper.py b/voicevox_engine/synthesis_engine/core_wrapper.py
index 720c470f4..047552bc5 100644
--- a/voicevox_engine/synthesis_engine/core_wrapper.py
+++ b/voicevox_engine/synthesis_engine/core_wrapper.py
@@ -357,6 +357,8 @@ def __init__(
         load_all_models: bool = False,
     ) -> None:
 
+        self.default_sampling_rate = 24000
+
         self.core = load_core(core_dir, use_gpu)
 
         self.core.initialize.restype = c_bool
diff --git a/voicevox_engine/synthesis_engine/synthesis_engine.py b/voicevox_engine/synthesis_engine/synthesis_engine.py
index 850c906a9..760243df7 100644
--- a/voicevox_engine/synthesis_engine/synthesis_engine.py
+++ b/voicevox_engine/synthesis_engine/synthesis_engine.py
@@ -234,7 +234,10 @@ def __init__(self, core: CoreWrapper):
         super().__init__()
         self.core = core
         self.mutex = threading.Lock()
-        self.default_sampling_rate = 24000
+
+    @property
+    def default_sampling_rate(self) -> int:
+        return self.core.default_sampling_rate
 
     @property
     def speakers(self) -> str:
diff --git a/voicevox_engine/synthesis_engine/synthesis_engine_base.py b/voicevox_engine/synthesis_engine/synthesis_engine_base.py
index f6f798a7c..fde453574 100644
--- a/voicevox_engine/synthesis_engine/synthesis_engine_base.py
+++ b/voicevox_engine/synthesis_engine/synthesis_engine_base.py
@@ -80,6 +80,11 @@ def full_context_label_moras_to_moras(
 
 
 class SynthesisEngineBase(metaclass=ABCMeta):
+    @property
+    @abstractmethod
+    def default_sampling_rate(self) -> int:
+        raise NotImplementedError
+
     # FIXME: jsonではなくModelを返すようにする
     @property
     @abstractmethod