an improvement in a front jaw for a safety ski binding . a base plate and a base member are fixed together and have two axes thereon which are arranged perpendicularly to the base plate . each axis pivotally supports a two - arm lever so that the longer lever arm engages the ski boot and the shorter lever arm engages a locking element which in turn engages a locking member movable against the force of a spring . the specific improvement is the utilization of a single locking member which is spring loaded and urged into engagement with a locking element . the locking element has a curved sector with differently inclined portions thereon so that as the curved sector moves relative to the locking element upon a swinging motion of the lever arms , the locking member will be moved against the spring resistance to a certain threshold point after which the lever arms will be permitted to move freely outwardly to facilitate a releasing function .