A device for the adjustable fastening of an accessory on a gliding board, which comprises a base comprising means for fastening the accessory and which accommodates a bar having a toothed part suitable for positioning in a complementary toothed part secured to the gliding board, which device comprises a crank that can rotate within the base and one end of which is connected to a lever, and wherein the bar has one degree of freedom and a part in contact with the bent part of the crank, so that a first position of the lever corresponds to the low position of the toothed part and a second position corresponds to a high position of the toothed part.