The aim of this study is to evaluate the effects of an assisted rehabilitation treatment through a robotic exoskeleton device on the functional recovery in a group of patients with hemiparesis from lesion of the first motor neuron (post-stroke), compared with a group of patients subjected to a conventional rehabilitation treatment. The patients enrolled in the study are chronic stroke injured with right hemiparesis of moderate to severe degree, by the system injury pyramid, never undergoing rehabilitation treatment with robots.