A front segment of a ski binding, consisting of a flat basement with holes to fix it on a ski, where by the sides of the basement there arise two arms, one fixed and one movable, on which there are, in upper side, fixed conic pikes in an opposite position, wherein in its lower part, the movable arm is in a rotating way joined with the basement by a lower pin in parallel with a longitudinal axis of the ski, in a connected state of the ski binding and the ski, characterized in that on the movable arm there is a controlling handle that is, in its lower third, joined with an upper pin in a rotating way in parallel with a longitudinal axis of a ski, in a connected state of the ski binding and the ski, while the controlling handle in its lower part makes a spur from the basement up to the upper pin and in the upper part makes an arm for fixing, activation and releasing of the ski boot from the front segment of the ski binding, that on the upper pin there is a wound spring to press the movable arm by the controlling handle towards the fixed arm in the axis of its placing on the lower pin and that the lower part of the controlling handle that creates a spur leans on the basement and has a dead-centre position that has to be gone through during the movement of the upper part of the controlling handle in the direction of the spring force, wherein the movable arm is moved up to a backstop position made by the basement in that it is assured against moving and in that a conic placing of a front part of a ski boot is tackable by the conic pikes, and that has to be overcome during the movement of the upper part of the controlling handle in the direction against the spring force, wherein the movable arm is released and moved away from the backstop position in that the conic placing of the front part of the ski boot is releasable from the conic pikes. that on the movable arm there is a controlling handle that is, in its lower third, joined with an upper pin in a rotating way in parallel with a longitudinal axis of a ski, in a connected state of the ski binding and the ski, while the controlling handle in its lower part makes a spur from the basement up to the upper pin and in the upper part makes an arm for fixing, activation and releasing of the ski boot from the front segment of the ski binding, that on the upper pin there is a wound spring to press the movable arm by the controlling handle towards the fixed arm in the axis of its placing on the lower pin and that the lower part of the controlling handle that creates a spur leans on the basement and has a dead-centre position that has to be gone through during the movement of the upper part of the controlling handle in the direction of the spring force, wherein the movable arm is moved up to a backstop position made by the basement in that it is assured against moving and in that a conic placing of a front part of a ski boot is tackable by the conic pikes, and that has to be overcome during the movement of the upper part of the controlling handle in the direction against the spring force, wherein the movable arm is released and moved away from the backstop position in that the conic placing of the front part of the ski boot is releasable from the conic pikes.