A safety ski binding for releasably securing a ski to the toe and heel portions of a ski boot. The toe portion of the binding includes a spring-biased plunger mounted on the ski and movable into engagement with the toe of the boot, and the heel portion of the binding includes a pair of spring-biased plungers mounted on the ski and movable into engagement with the heel of the boot. The toe and heel engaging plungers are each inclined downwardly toward the upper surface of the ski, and the heel engaging plungers are also inclined inwardly toward the longitudinal center line of the ski. Ball bearings are rotatably and shiftably mounted in the ends of the plungers in such a way as to reduce the force required to effect engagement of the ski with the boot but to require a greater force to effect disengagement.