An electrostatic actuator comprises first and second movable sections and a stator. The stator has a hollow frame into which the movable sections are arranged independently. Driving electrodes are provided on surfaces of the movable sections and holding electrodes are also provided on the opposite surfaces pf the movable section. A driving electrode section is provided on the inner surface of the stator facing the driving electrodes on the movable section. Also, holding electrode sections are provided on the inner surface of the stator facing the holding electrodes on the movable section. Stripes of the electrodes are arranged in a longitudinal direction and each strip is extended in a lateral direction crossing the longitudinal direction, and the holding electrodes are extended in the longitudinal direction.