The present invention relates to a wheelchair comprising a wheelchair frame (10) having a front portion (11), a rear portion (12) and side edges (13, 14). According to the invention, this wheelchair comprises: - a fixing device intended for fixing a motor-driven propulsion assembly (20) of said chair to said frame, said fixing device comprising a support bar (17), a first attachment device (18) for assembling a first end of said support bar (17) to said frame, and a second attachment device (19) for connecting the other end of said support bar (17) to said support bar (17). frame, - said fixing device being configured so that said support bar (17) is movable between an extended position where said bar connects said lateral edges (13, 14) of said frame by allowing said assembly (20) to engage propulsion on said bar, said support bar (17) being placed between said front and rear portions (11) of said frame and at least a second position, said erasure of said support bar (17). La présente invention concerne un fauteuil roulant comprenant un châssis (10) de fauteuil roulant présentant une partie (11) avant, une partie (12) arrière et des bords latéraux (13, 14). Selon l'invention, ce fauteuil roulant comprend : - un dispositif de fixation destinée à la fixation d'un ensemble (20) de propulsion à moteur dudit fauteuil sur ledit châssis, - ledit dispositif de fixation comportant une barre (17) de support, un premier dispositif d'attache (18) pour assembler une première extrémité de ladite barre (17) de support audit châssis, et un second dispositif d'attache (19) pour relier l'autre extrémité de ladite barre (17) de support audit châssis, - ledit dispositif de fixation étant configuré de sorte que ladite barre (17) de support est mobile entre une position déployée où ladite barre relie lesdits bords latéraux (13, 14) dudit châssis en permettant l'accrochage dudit ensemble (20) de propulsion sur ladite barre, ladite barre (17) d
