An erection aid comprises an elastic device adapted to be placed around at least a part of a penis, which device is in the form of a condom (1) or a tightening ring (10). The device is equipped with a piezoelectric unit (3), for example a piezoelectric foil, for emission of stimulating vibrations. The device is self-supplied with a battery (7) and an electronic miniature circuit (4) for activation of the piezo-unit (3).