A walker (1) is disclosed, which comprises a base frame (20) supported by wheels (22) and support rods (3, 4) mounted on the said base frame (2) to support at a suitable height support means (7, 8) designed to support the patient during walking. The support rods (3, 4) are hinged mutually and to the base frame (2), in such a way to go from the operating position, in which the support means (7, 8) are at a suitable height to support the patient, to a minimum-volume position, in which the support means (7, 8) are near the baseframe (2).