The piezoelectric actuator

A piezoelectric actuator (1), which in particular serves as an actuator for fuel injection valves, comprising a actuator body (3) having a plurality of ceramic layers (4) and a plurality of between the ceramic layers (4) arranged electrode layers (5, 6) and external electrodes (7, 8), alternately with the electrode layers (5, 6) are electrically contacted. Here, the external electrodes (7, 8) made of corrugated metal sheets (7, 8) is formed.