diff --git a/client/src/extension.ts b/client/src/extension.ts
index 8fb2ce7..1d3a68e 100644
--- a/client/src/extension.ts
+++ b/client/src/extension.ts
@@ -7,6 +7,7 @@ import {
   StatusBarAlignment,
   ThemeColor,
   StatusBarItem,
+  Uri,
 } from "vscode";
 
 import {
@@ -17,6 +18,8 @@ import {
   ExecuteCommandRequest,
 } from "vscode-languageclient/node";
 
+import { objectToSnake } from "ts-case-convert";
+
 let client: LanguageClient;
 
 //拡張機能を立ち上げたときに呼び出す関数
@@ -74,6 +77,75 @@ export function activate(context: ExtensionContext) {
     }),
   );
 
+  type OptionsRecord = Record<string, boolean | number | string>;
+
+  const isFileExists = async (uri: Uri): Promise<boolean> => {
+    try {
+      await workspace.fs.stat(uri);
+      return true;
+    } catch (_) {
+      return false;
+    }
+  };
+
+  context.subscriptions.push(
+    commands.registerCommand(
+      "uroborosql-fmt.sync-config-file-with-extension-config",
+      async () => {
+        // uroborosql-fmt の設定を取得
+        const vsCodeConfig = workspace.getConfiguration("uroborosql-fmt");
+
+        // Default value of `uroborosql-fmt.configurationFilePath` is "".
+        const vsCodeConfigPath: string = vsCodeConfig.get(
+          "configurationFilePath",
+        );
+        const configFilePath =
+          vsCodeConfigPath !== "" ? vsCodeConfigPath : ".uroborosqlfmtrc.json";
+
+        // VSCodeで開いているディレクトリを取得
+        // 開いていない場合はエラーを出して終了
+        const folders = workspace.workspaceFolders;
+        if (folders === undefined) {
+          window.showErrorMessage(
+            "Error: Open the folder before executing this command.",
+          );
+          return;
+        }
+        const folderPath = folders[0].uri;
+        const configFileFullPath = Uri.joinPath(folderPath, configFilePath);
+
+        // 設定値 `configurationFilePath` の除外・ value が null のエントリを除外・ WorkSpaceConfiguration が持つメソッドと内部オブジェクトを除外
+        const formattingConfig: OptionsRecord = Object.fromEntries(
+          Object.entries(vsCodeConfig).filter(
+            ([key, value]) =>
+              key !== "configurationFilePath" &&
+              value !== null &&
+              typeof value !== "function" &&
+              typeof value !== "object",
+          ),
+        );
+
+        let existingConfig: OptionsRecord;
+        if (await isFileExists(configFileFullPath)) {
+          const file = await workspace.fs.readFile(configFileFullPath);
+          existingConfig = JSON.parse(file.toString());
+        } else {
+          existingConfig = {};
+        }
+
+        // 明示的に設定したものだけを上書きする
+        const merged = {
+          ...existingConfig,
+          ...objectToSnake(formattingConfig),
+        };
+        const content = JSON.stringify(merged, null, 2);
+
+        const blob: Uint8Array = Buffer.from(content);
+        await workspace.fs.writeFile(configFileFullPath, blob);
+      },
+    ),
+  );
+
   // ステータスバーの作成と表示
   const statusBar = createStatusBar();
   statusBar.show();
diff --git a/package.json b/package.json
index f41a93d..b64d136 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,10 @@
       {
         "command": "uroborosql-fmt.uroborosql-format",
         "title": "format sql"
+      },
+      {
+        "command": "uroborosql-fmt.sync-config-file-with-extension-config",
+        "title": "Synchronize uroborosql-fmt config file with Extension config"
       }
     ],
     "configuration": {