Abstract: The invention relates to an element for retaining a boot on a ski including a body and a retaining jaw that are generally symmetrical with respect to a longitudinal and vertical median plane, the jaw being biased by a return spring housed in the body, the return spring being connected to the jaw by an anchor having two lateral arms, a central strap and a central fork having two teeth, the spring elastically maintaining the arms of the anchor in support against two retaining pins affixed to the body, the jaw having a median pin engaged between the two teeth of the fork. At least one of the elements of the anchor, which are the arms, the strap and the fork, is asymmetrical with respect to the longitudinal and vertical median plane defined by the body and the jaw.