diff --git a/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/MissingModelDataException.java b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/MissingModelDataException.java
new file mode 100644
index 000000000..fde59a6e1
--- /dev/null
+++ b/crates/voicevox_core_java_api/lib/src/main/java/jp/hiroshiba/voicevoxcore/exceptions/MissingModelDataException.java
@@ -0,0 +1,14 @@
+package jp.hiroshiba.voicevoxcore.exceptions;
+
+import java.io.IOException;
+
+/** モデルデータが見つからなかった。 */
+public class MissingModelDataException extends IOException {
+  public MissingModelDataException(String message) {
+    super(message);
+  }
+
+  public MissingModelDataException(String message, Throwable cause) {
+    super(message, cause);
+  }
+}
diff --git a/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi b/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
index 3a47ef02b..cc1ce8851 100644
--- a/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
+++ b/crates/voicevox_core_python_api/python/voicevox_core/_rust/__init__.pyi
@@ -47,6 +47,11 @@ class StyleAlreadyLoadedError(Exception):
 
     ...
 
+class MissingModelDataError(Exception):
+    """モデルデータが見つからなかった。"""
+
+    ...
+
 class InvalidModelDataError(Exception):
     """無効なモデルデータ。"""