To provide a piezoelectric actuator which has a great displacement amount and high reliability and further is easy to manufacture and inexpensive.

In a bimorph type piezoelectric actuator with piezoelectric ceramics plates 1a and 1b adhered on both sides of a shim material 2, the shim material 2 is comprised of prepregs, and the conductor 4 of an electric wire for extracting an electrode from the shim material 2 is fixed while being held between the piezoelectric ceramics plate 1a and the shim material 2.