To provide piezoelectric actuators which reduces a camera case in size and weight and effectively removes dust attached to an optical element by increasing vibration generating force.

In the piezoelectric actuators 12 and 12b for vibrating an optical element 11 in a camera to remove dust attached to a lens or the like constituting the optical element, laminated piezoelectric elements 27 are respectively connected to both surfaces of an elastic conductive SIMM layer 25. In the laminated piezoelectric elements 27, a plurality of electrode layers and piezoelectric ceramic layers 24 are alternately laminated, electrodes facing each other are configured so as to be respectively connected to two different potentials to be driven, and a laminated piezoelectric bimorph structure is formed, which causes bending displacement by applying voltage so that the laminated piezoelectric elements 27 on both the surfaces of the SIMM layer 25 may be distorted in the opposite direction.