A relay valve (2) for a compressed air system, has a housing, which has a pressure medium inlet that can be connected to a pressure medium source, at least one pressure medium outlet that can be connected to a consuming unit, at least one control inlet, and at least one vent (32) leading to atmosphere. The relay valve (2) furthermore has a relay valve piston (14), which is arranged in the housing in such a way that the relay valve piston can be moved along a relay valve piston axis (16) and divides a control chamber (22) and a working chamber (26) from each other in the housing. The relay valve (2) has a damping volume (52), which is pneumatically connected to the control chamber (22), thereby advantageously enabling the oscillation capacity of the relay valve piston (14) to be reduced.