diff --git a/dictation_client/src/common/errors/code.ts b/dictation_client/src/common/errors/code.ts
index 54b116c..30131c1 100644
--- a/dictation_client/src/common/errors/code.ts
+++ b/dictation_client/src/common/errors/code.ts
@@ -27,4 +27,6 @@ export const errorCodes = [
   "E010401", // PONumber重複エラー
   "E010601", // タスク変更不可エラー（タスクが変更できる状態でない、またはタスクが存在しない）
   "E010602", // タスク変更権限不足エラー
+  "E010801", // ライセンス不在エラー
+  "E010802", // ライセンス取り込み済みエラー
 ] as const;
diff --git a/dictation_client/src/features/license/licenseCardActivate/operations.ts b/dictation_client/src/features/license/licenseCardActivate/operations.ts
index 103da22..aff97ac 100644
--- a/dictation_client/src/features/license/licenseCardActivate/operations.ts
+++ b/dictation_client/src/features/license/licenseCardActivate/operations.ts
@@ -50,7 +50,17 @@ export const activateCardLicenseAsync = createAsyncThunk<
     // e ⇒ errorObjectに変換"
     const error = createErrorObject(e);
 
-    const errorMessage = getTranslationID("common.message.internalServerError");
+    let errorMessage = getTranslationID("common.message.internalServerError");
+
+    if (error.code === "E010801") {
+      errorMessage = getTranslationID(
+        "cardLicenseActivatePopupPage.message.LicenseKeyNotExistError"
+      );
+    } else if (error.code === "E010802") {
+      errorMessage = getTranslationID(
+        "cardLicenseActivatePopupPage.message.LicenseKeyAlreadyActivatedError"
+      );
+    }
 
     thunkApi.dispatch(
       openSnackbar({