An adapter to facilitate attaching non-standard implements to a tractor equipped with a proprietary quick-connect hitch system. An elongated horizontal member, equipped with cylindrical end regions adapted for securing in hook regions of a quick-connect hitch system, carries a ball hitch or other similar universal hitch attachment mechanism. The novel adapter, therefore, allows attachment of implements having a ball hitch, a universal pin type hitch or other non-standard attachment mechanism to tractors equipped with quick-connect hitch systems. The novel adapter is rotatable around its major axis to allow two diverse hitches to be accommodated. For example, a ball-type hitch as well as another type connection my be selected by rotating the adapter 180° around its major axis.