To restore gait, modern concepts of rehabilitation support a repetitive task-specific approach. In recent years it has also been shown that higher intensities of walking practice (resulting in more repetitions trained) result in better outcomes for patients after stroke. Recently, the introduction of robotic devices for gait rehabilitation have showed to be a feasible approach in order to improve gait ability in patients with stroke and spinal cord lesions. These devices allow to train patients under a graduated body weight support condition and to guide the patient's steps reproducing a physiologic gait pattern for as long as the clinical conditions allow. This activity can be executed requiring only supervision by a physiotherapist and in absolutely safety condition for the patient.