A device for retaining a foot or a boot on a sports apparatus. The base of the device, having the general shape of a plate, includes a zone for anchoring to the apparatus, as well as at least one zone for fastening a foot or boot retaining mechanism, the fastening zone being apart from the anchoring zone. Stiffening ribs extend between the anchoring zone and the fastening zone. Two adjacent stiffening ribs converge toward the fastening zone, between the anchoring zone and the fastening zone.