The present invention relates to a device for assisting the locomotion (1) intended in particular for the training of locomotion for paediatric patients suffering from and cerebral palsy, said device including: - a frame (2) mounted on rollers (4) - a seat (3) allowing the reception of an individual - of the connecting means (20) attached to the chassis (2) and to the seat (3) along two pivot connections (21a, 21b) and allowing the passage between a substantially horizontal position and a substantially vertical position of the seat, corresponding respectively to the positions of locomotion of the four tabs and seat.