A device (10) is described, for blocking a shoe (15) for an exoskeleton (102) of a system (100) for rehabilitating the walk comprising a structure (11) designed to externally wrap the heel of a patient (101), allowing the contact between the sole of the shoe (15) and the ground, the structure (11) comprising a rear element (12) connectable to a bearing and moving structure of a foot (400)； a band assembly (14) connected to the structure (11) to strap up and tighten the shoe (15) of the patient (101) in order to make it integral with the device (10)； an exoskeleton and a system comprising such device are further described.
