Ski boot

A ski boot comprising:

• a cuff and a lower shell mutually coupled to define a substantially rigid support structure;
• a liner designed to receive a foot of a user, said liner being positionable inside said support structure, the support structure having a first end portion and a second end portion mutually slidable between a first initial position and a second operative position so as to vary a mutual distance between the first and the second position and thus a configuration of the ski boot;
• a plurality of connection elements for an operative connection of said first and said second end portions;
• and
• a single lever selectively actuatable by the user, which is operatively connected with said plurality of connection elements so that an action of the single lever allows a sliding of said first and said second end portions from said first initial position to said second operative position;
• wherein each of the connection elements of said plurality comprises a pair of mutually engeagable male and female elements, each female element being anchored to one of said first and second end portions, the male element being operatively connected to another one of said first and second end portions, a plurality of tensioners being interposed between each of said male elements and said single lever, so that said single lever acts simultaneously on all connection elements of said plurality.