Ski binding apparatus

A toe unit spring biases a release pin into mating engagement with an arcuate socket on a sole plate which is releasably securable to a ski boot. For increased anti-shock retention, the arcuate socket has inclined side walls with a lateral extent greater than two times the vertical extent of an inclined bottom wall, and greater than two times the diameter of a hemispherical end of the release pin. The sole plate has a pivot bar located under the ball of the skier's foot, and a rear beveled tongue which is urged into one of plural angled recesses in a rear retainer plate. The retainer plate can be rotated to change the ratio of upward to lateral release pressure. To provide cant adjustment, cant strips having snap-fit connectors are insertable into apertures in the sole plate.