diff --git a/src/backend/electron/main.ts b/src/backend/electron/main.ts
index 63330037f6..3e9894339a 100644
--- a/src/backend/electron/main.ts
+++ b/src/backend/electron/main.ts
@@ -113,7 +113,7 @@ process.on("unhandledRejection", (reason) => {
   log.error(reason);
 });
 
-function initializeAppPaths() {
+function getAppPaths() {
   let appDirPath: string;
   let __static: string;
 
@@ -129,7 +129,7 @@ function initializeAppPaths() {
 
   return { appDirPath, __static };
 }
-const { appDirPath, __static } = initializeAppPaths();
+const { appDirPath, __static } = getAppPaths();
 
 protocol.registerSchemesAsPrivileged([
   { scheme: "app", privileges: { secure: true, standard: true, stream: true } },
@@ -196,7 +196,7 @@ initializeRuntimeInfoManager({
   appVersion: app.getVersion(),
 });
 initializeEngineInfoManager({
-  defaultEngineDir: appDirPath,
+  appDirPath,
   vvppEngineDir,
 });
 initializeEngineProcessManager({ onEngineProcessError });
diff --git a/src/backend/electron/manager/engineInfoManager.ts b/src/backend/electron/manager/engineInfoManager.ts
index 84a5bff3fa..5aa9781f49 100644
--- a/src/backend/electron/manager/engineInfoManager.ts
+++ b/src/backend/electron/manager/engineInfoManager.ts
@@ -21,7 +21,7 @@ const log = createLogger("EngineInfoManager");
 
 /** 利用可能なエンジンの情報を管理するクラス */
 export class EngineInfoManager {
-  defaultEngineDir: string;
+  appDirPath: string;
   vvppEngineDir: string;
 
   /** 代替ポート情報 */
@@ -29,8 +29,8 @@ export class EngineInfoManager {
 
   private envEngineInfos = loadEnvEngineInfos();
 
-  constructor(payload: { defaultEngineDir: string; vvppEngineDir: string }) {
-    this.defaultEngineDir = payload.defaultEngineDir;
+  constructor(payload: { appDirPath: string; vvppEngineDir: string }) {
+    this.appDirPath = payload.appDirPath;
     this.vvppEngineDir = payload.vvppEngineDir;
   }
 
@@ -93,11 +93,14 @@ export class EngineInfoManager {
           pathname: pathname === "/" ? "" : pathname,
           isDefault: true,
           type: engineInfo.type,
-          executionFilePath: path.resolve(engineInfo.executionFilePath),
+          executionFilePath: path.resolve(
+            this.appDirPath,
+            engineInfo.executionFilePath,
+          ),
           path:
             engineInfo.path == undefined
               ? undefined
-              : path.resolve(this.defaultEngineDir, engineInfo.path),
+              : path.resolve(this.appDirPath, engineInfo.path),
         } satisfies EngineInfo;
       });
   }
@@ -253,7 +256,7 @@ export class EngineInfoManager {
 let manager: EngineInfoManager | undefined;
 
 export function initializeEngineInfoManager(payload: {
-  defaultEngineDir: string;
+  appDirPath: string;
   vvppEngineDir: string;
 }) {
   manager = new EngineInfoManager(payload);
diff --git a/src/domain/defaultEngine/envEngineInfo.ts b/src/domain/defaultEngine/envEngineInfo.ts
index c531cab3f9..9c23ff8f31 100644
--- a/src/domain/defaultEngine/envEngineInfo.ts
+++ b/src/domain/defaultEngine/envEngineInfo.ts
@@ -19,6 +19,7 @@ const envEngineInfoSchema = z
   .and(
     z.union([
       // エンジンをパス指定する場合
+      // NOTE: 相対パスの場合はアプリのパスで解決する
       z.object({
         type: z.literal("path").default("path"),
         executionFilePath: z.string(),