Safety ski binding designed to hold releasably in position the front portion of a boot (2) mounted on the ski (3), comprising a forward fall-compensation mechanism comprising a pedal (12) forming a forward fall sensor. The front end (12a) of the pedal (12) is, in the pedal rest position, positioned at a distance (d) above a moveable control element (9) which approximates the standard tolerance for the thickness of the sole (6) of the boot, i.e., by a distance between accepted maximum and minimum thicknesses of the sole (6).