The present invention relates to a foldable wheelchair (10) comprising: - a chair assembly (20) comprising a seat assembly (22), in which a seat frame (22b) defines a plane P1, and a backrest assembly (21), in which a backrest frame (21b) defines a plane P2, - a wheel assembly (40) comprising a rear wheel assembly (41) including at least two rear wheels (41a, 41b) in rotation around or defining a first rotation axis AR1, a front wheel assembly (42) including at least two front wheels (42a, 42b) in rotation around or defining a second rotation axis AR2, and a folding frame (43) connected to the rear and front wheel assemblies (41, 42), wherein said folding frame (43) is foldable along a lateral direction between an unfolded position and a folded position, said first rotation axis AR1 and said second rotation axis AR2 being closer in said folded position than in said unfolded position, such that, when the folding frame (43) moves from its unfolded position to its folded position, the second rotation axis AR2 moves rearward relative to the chair assembly (20) and the first rotation axis AR1 does not move relative to the chair assembly (20).
