To provide an ultrasonic vibrating table having horizontal vibration displacement almost uniform over the entire of the surface of the table in a low height of a device and large table surface area, performing machining in any direction and enhancing machining efficiency.

Ultrasonic alternating voltage is impressed on thickness slide piezoelectric elements 5a and 5b from ultrasonic driving circuits 8a and 8b. As a result, slide vibration in directions shown by arrows A and B of a machining table 2 is excited. When machining in the direction of the arrow A is performed, ultrasonic alternating voltage is impressed on the thickness slide piezoelectric element 5a from the ultrasonic driving circuit 8a. When machining in the direction of the arrow B is performed, ultrasonic alternating voltage is impressed on the thickness slide piezoelectric element 5b from the ultrasonic driving circuit 8b.