A clip for attaching a staple that joins conveyor belt ends that comprises a top portion and a plurality of claws that extend substantially perpendicular from the top portion and are adapted to extend through corresponding holes in the staple. The top portion is formed of a metal sheet, the configuration of which corresponds to that of an accommodation recess provided in a top plate of the staple. The top portion bears at least two claws of the plurality of claws. Each of the claws is connected to the top portion by a bend and each bend includes a re-entrant reinforcing rib embossed therein. Each reinforcing rib is provided in the longitudinal direction of the respective claw approximately in the middle of the width of the respective claw. The claws are formed either by bending the metal sheet at the bends or by attaching the claws to the metal sheet.