The securing device, to be mounted on a ski-board, includes a main body with a support base for a sole, two lateral flanges, and an assembly for the attachment of the shoe to the main body, including: a protective element and first and second means for attaching the latter onto the first and the second flanges. The first means include two serrated straps, namely front and rear. The proximal end of at least one strap is mounted so that it pivots on the first flange. The distal ends mate with front and rear locking systems fixed onto the protective element, for adjusting the length of said straps. The second flange is fitted with front and rear attachment systems. The second means of attachment include a fixing handle, pierced with two holes, in which the attachment systems engage, and a closure system by which the handle is connected to the protective element.