Actuator module and fuel injection valve

The actuator module (2) has a piezoelectric actuator body (18), transition pieces (19,20) attached to the actuator body and a sealing sleeve (23) which seals an inner space (24). The actuator body is arranged in the inner space and a pressure bolt (29) is provided which limits a compensation chamber (37) between the transition piece and the pressure bolt. The inner space is filled with a pressure fluid (40) and is connected with the compensation chamber. An independent claim is also included for a fuel injection valve with a valve closure body.