A piezoelectric actuator part which generates a driving force to rotate a mirror part about a rotation axis includes a first actuator part and a second actuator part having a both-end supported beam structure in which base end parts on both sides in an axial direction of the rotation axis are fixed. The first actuator part has a first electrode part and second electrode parts. The second actuator part has third electrode parts and a fourth electrode part. The arrangement of the each electrode part constituting an upper electrode corresponds to a stress distribution of principal stresses in a piezoelectric body during resonance mode vibration, and a piezoelectric portion corresponding to positions of the first electrode part and the third electrode parts and a piezoelectric portion corresponding to positions of the second electrode parts and the fourth electrode part generate stresses in opposite directions.