An ultrasonic actuator includes: a piezoelectric element 10 for generating various kinds of vibrations having different vibration directions; a driver element provided on the piezoelectric element 10 and actuated in accordance with the vibration of the piezoelectric element 10 to output driving force toward a certain driving direction; feeding electrodes 8 provided on the piezoelectric element 10 and electrically connected to the piezoelectric element 10; and feeding-supporting parts 6A, 6B, 7A, 7B and 9A abutting the feeding electrodes to elastically support the actuator body and serving as feeding terminals for supplying a voltage to the feeding electrodes 8.