Abstract: The disclosure relates to a piezoelectric drive, such as for permanently protected use in a moist environment, which includes a housing having a chamber, which chamber is hermetically sealed by at least one elastic membrane, and includes a piezoelectric drive unit in the hermetically sealed chamber for driving a drive element. The piezoelectric drive unit can include at least one piezoelectric bending actuator, which produces a bending deflection transversely to the elastic membrane when electrically activated. For example, two bending actuators can be arranged in series or parallel.