Abstract: A ski boot, comprising: a hull, a shaped plate belonging to the hull, a sole adapted to be removed from the hull and interchangeable; the sole comprises a front portion and a back portion that are separated from each other and constrained to the hull through fixing elements, wherein the sole is adapted for a specific skiing discipline and is compatible with ski bindings provided with a plurality of pins integral with the ski that are fitted into corresponding shaped recesses belonging to the hull; the shaped recesses are positioned on the sides of the plate, which is fixedly constrained to the ski boot.