Abstract: The releasing plate which is carried for lateral pivotal motion by a pivot in secured to the ski and which is releasably retained in its skiing position by releasing means is comprised of two members which are adapted to be relatively slidable in the direction of the longitudinal axis of the releasing plate. The rear plate member which is supported for pivotal movement by means of said pivot pin attached to the ski has its rear end provided with automatic heel holding means adapted to be released upon the skier falling in a forward direction, whereas the front plate member carries a ski boot sole holder. The front plate member is connected to a sliding member which is slidably guided in said rear plate member, said slide member being urged towards the front end of the ski by means of compression springs.