Abstract: A jump cup for supporting an end of a jump pole used in equestrian activities includes a curved plate forming an upwardly facing concave surface. A lateral support pin and a mounting pin are fixed to the plate and project from a rear side thereof. The mounting pin includes an axle portion that can be inserted into a hole of a conventional jump standard, the axle portion defining an axis about which the plate can pivot downwardly once the lateral support pin has passed across a front surface of the standard, whereby the standard is straddled by the lateral support pin and a portion of the mounting pin. The jump cup is formed of fixedly interconnected parts and can be installed or removed with one hand of a user.