Piezoelectric actuator, in particular for actuating a valve in a motor vehicle

The invention relates to a piezoelectric actuator comprised of an actuator housing (10) having a receiving opening (14), which is axially open at one end, of an axially elongated lifting body (16), which can be inserted into said receiving opening and which is made of a piezoelectric material, of an electrode (22), which is placed against the piezoelectric material, and of electric supply means (24, 32) for supplying voltage. The invention provides that the supply means (24, 32) are brought into contact with the electrode (22) in the area of the first longitudinal end (18) of the lifting body. From there, the supply means run along the lifting body at least until they are approximately in the area of an axially opposed second longitudinal end (20) of the lifting body and are subsequently led out through an outlet channel.