Abstract: A safety ski binding having a sole plate releasably secured to a ski between a pair of holding parts. The sole plate includes a toe gripping device for gripping over the toe of a ski boot and, in addition, a heel holding device adjustable in the longitudinal direction for holding the heel of the ski boot to the sole plate. The heel holding device is connected to a carriage member which is composed of two parts, both movable relative to the other. One of the parts is fixable by a locking device in several positions on the sole plate to fix the carriage member relative to the sole plate.