Actuator module

Actuator module (1) comprises at least one piezoelectric or magnetostrictive element (2) and contact pins (3) for producing an electrical contact with the piezoelectric or magnetostrictive element. The actuator module is enclosed by a sleeve (7) having an inner diameter that is slightly smaller than the outer diameter of the actuator module without the sleeve. Preferred Features: The sleeve is made of copper or aluminum or an alloy of these materials. The sleeve covers a plastic sleeve (6) of the actuator module.