A lens actuator for driving a lens received in a lens barrel includes a plate shaped body comprising a through hole defined in the center thereof, an inner portion surrounding the through hole, an outer portion for mounting the lens barrel thereon, and a plurality of resilient portions connected between the inner portion and the outer portion. A plurality of piezoelectric structures formed on the respective resilient portions. The piezoelectric structures are configured for mounting the lens thereon and driving the lens to move relative to the lens barrel.