The present invention discloses an optical disk drive comprising a traverse, a traverse frame, a chassis and a stopper. The traverse frame is disposed on the chassis. And one end of the traverse is disposed on the chassis and the other end is disposed on the traverse frame. The stopper includes a protruded arm and an extended arm extended from the protruded arm. The protruded arm is integrated with the traverse by sheet metal forming and the extended arm is disposed above the traverse frame. The extended arm of the stopper is interfered with the traverse frame when a heavy shock is applied to the optical disk drive. Therefore, the optical disk drive including the stopper can prevent the separation between the traverse and the traverse frame without screws when a sudden hit is applied thereto.