Disclosed is an actuator unit for opening or closing a valve opening of a valve for a pneumatic adjusting device of a vehicle seat, comprising a circuit board with a top side extending in a circuit board plane, an actuating element with an actuating section for opening or closing the valve opening and a bending section connected to the actuating section, and an actuator element with a first end mechanically connected to the actuating section and a second end mechanically connected to the circuit board. The actuator element is configured to, when actuated, bend the bending section such that the actuating section is moved between a first position for opening the valve opening and a second position for closing the valve opening. The actuating section is arranged on a first side and the bending section is arranged on a second side, situated opposite the first side, respective of the circuit board plane.