Abstract: A mount is used in combination with a ski having a longitudinally extending upper surface, a ski boot, and at least one clamp for securing the boot to the upper surface. The mount comprises an element fixed to the ski, an element fixed to the clamp, and an adjustment mechanism interconnecting the elements for relative stepless displacement transversely of the ski and for fixing them relative to each other against relative movement. When the boot is held by individual toe and heel clamps, each of these clamps is associated with respective such elements and adjustment mechanism. The mechanism normally includes at least one micrometric screw and at least one rack meshing with the screw. The system can also allow the boot to pivot about an axis perpendicular to the upper ski surface relative to the ski.