The door handle device of a vehicle is provided with: a handle base disposed along the rear surface of a door panel; and an operation handle that is coupled to the handle base. The handle base has hook-shaped pressing portions that ride on a protruding portion provided to the oppossed side edges along the sliding direction of a mounting opening provided to the door panel accompanying a sliding operation along the door panel; a panel-abutting portion that sandwiches the door panel in cooperation with the hook-shaped pressing portions; and an elastic locking piece that restricts the rearwards motion of the handle base by resilient locking to the center of a rear end edge of the mounting opening, and restricts removal of the hook-shaped pressing portions from the protruding portion.