A folding 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) , wherein a back-up frame (21b) defines a plane P2, a wheel assembly (40) comprising a rear wheel assembly (41) that includes at least two rear wheels (41a, 41b) that rotate around or defining a first axis (AR1) of rotation, a set (42) of front wheels that includes at least two front wheels (42a, 42b) that rotate around or that define a second axis (AR2) of rotation, and a frame (43) folding connected to the rear and front wheel assemblies (41, 42), wherein said folding frame (43) is foldable along a longitudinal direction between an unfolded position and a folded position, in which said first rotation axis (AR1) and said second rotation axis (AR2) are closer in said folded position it gives that in said deployed position, characterized in that when the folding frame (43) moves from its deployed position to its folded position, the second axis of rotation (AR2) moves backwards in relation to the chair assembly (20), the first axis (AR1) of rotation does not move relative to the chair assembly (20) and the plane P2 is parallel or approximately parallel to the plane P1.Una silla (10) de ruedas plegable que comprende: un conjunto (20) de silla que comprende un conjunto (22) de asiento, en el que un bastidor (22b) de asiento define un plano P1 y un conjunto (21) de respaldo, en el que un bastidor (21b) de respaldo define un plano P2, un conjunto (40) de ruedas que comprende un conjunto (41) de ruedas posterior que incluye al menos dos ruedas (41a, 41b) traseras que giran alrededor de o que definen un primer eje (AR1) de rotación, un conjunto (42) de ruedas frontal que incluye al menos dos ruedas (42a, 42b) delanteras que giran alrededor de o que definen un segundo eje (AR2) de rotación, y un bastidor (43) plegable conectado a los conjuntos (41, 42) de ruedas posterior y frontal, en el que dicho bastidor
