A device for receiving and retaining a foot or a boot on a sports apparatus is disclosed. The device has a seat associated with a rear support element, the rear support element having a support surface facing a free surface, the rear support element being rotatably mounted with respect to the seat, an abutment limiting a rearward rotation of the rear support element, the abutment having a cursor that is movable along the rear support element, as well as a mechanism for immobilizing the cursor on the rear support element. A wall covers the cursor on the side of the free surface, the immobilizing mechanism extending through the wall.