Ski binding

A toe-piece for binding a boot onto a gliding board, the toe-piece comprising:

• a first front boot-retaining device designed for retaining the boot in a slope-ascending configuration of the toe-piece, said first boot-retaining device comprising boot-fastening mechanisms defining a boot-pivoting hinge axis in the slope-ascending configuration;
• a second front boot-retaining device provided for retaining the boot in a slope-descending configuration of the toe-piece, said second boot-retaining device comprising two wings each of the two wings supporting a lateral interface surface designed to come into contact with a front portion of the boot when the toe-piece is in the slope-descending configuration;
• a longitudinal stop surface movable between the following positions:
• an active position in which the longitudinal stop surface is designed to cooperate with the front portion of the boot;
• and
• an inactive position in which the longitudinal stop surface is designed not to be capable of cooperating with the front portion of the boot;
• the longitudinal stop surface being movable in relation to the two wings.