A frame (1) that is similar to that of a conventional wheelchair with footrest (2), pushing handles (3) and provided with a pair of rear driving wheels (4) and another pair of front guiding wheels (5), a wheelchair with armrests (6) that slide in a longitudinal front-back direction over guide rails (7), with each guide rail provided with a rack (9) that through a pair of pinions (10-10) transmit movement to a transverse axle (11) to which an indented corona (15) is keyed, which through a transmission (16) allows a turning movement of the rear wheel (4) corresponding to the chair, through a set of pinions (18), so that with an alternating movement of the users arms (13), acting over the armrests (6), a turning movement is created for the rear wheels (4) of the chair, allowing a noticeable improvement in the comfort of the user. The handle (19) associated withthe armrest (6) facilitates said action, and the handle can also be used to activate the gear change established between the corona (15) and the pinions (18) as well as to act as a brake for the chair.
