The present invention relates to a wheelchair (1) comprising a frame (2) resting on wheels (30, 31) and supporting a seat (4), and a backrest (5) adapted to be inclined to different positions thanks to control means, said backrest (5) being delimited by two tubular lateral uprights (6) whose lower end (60) is pivotally mounted about an axis X parallel to the backrest (5) and supported by a shoe ( 7) connected to an element (8) of said frame (2), said wheelchair (1) further comprising folder locking means (5) in a given position. It is characterized in that said locking means in the position of the backrest (5) comprise, for each tubular upright (6), a row (9) of notches (10a-10d) formed in a bottom wall (11) that said shoe (7), along an axis perpendicular to the X axis, and a cylindrical member (12) whose lower end is extended by a stud (13), said cylindrical member ( 12) being connected to said control means and being slidably mounted in the lower end (60) of the tubular upright (6) between an active position in which the stud (13) is housed in a notch (10a-10d) and a position inactive in which the pin (13) is spaced from the row (9) of notches (10a-10d). La présente invention concerne un fauteuil roulant (1) comportant un châssis (2) reposant sur des roues (30, 31) et supportant une assise (4), ainsi qu'un dossier (5) adapté pour être incliné vers différentes positions grâce à des moyens de commande, ledit dossier (5) étant délimité par deux montants latéraux tubulaires (6) dont l'extrémité inférieure (60) est montée pivotante autour d'un axe X, parallèle au dossier (5) et supporté par un sabot (7) relié à un élément (8) dudit châssis (2), ledit fauteuil roulant (1) comportant en outre des moyens de blocage du dossier (5) dans une position donnée. Il est caractérisé en ce que lesdits moyens de blocage en position du dossier (5) comportent, pour chaque montant tubulaire (6), une rangée (9) d'encoches (10a-10d) formées dans une paroi de fond (11) que présen
