An accessory part to be connected to an operating table has a connecting element (12, 16) and a component part of the operating table has a receiving area (14) for receiving at least an area of the connecting element (12, 16). An engagement element (22, 24) projects laterally from the connecting element (12, 16). The receiving area (14) has at least one guideway (18, 20) with which the engagement element (22, 24) engages during insertion of at least an area of the connecting element (12, 16) into the receiving area (14). When deformed, an elastically deformable element (52) exerts a force on the engagement element (22, 24). By the force exerted on the engagement element (22, 24) and by the course of the guideway (18, 20) a force (FA) is exerted in the direction of insertion (P2) on the connecting element (12, 16) when the accessory part and the operating table are connected.