Abstract: The present wheel chair, especially for invalids, is foldable in a vertical irection rather than horizontally to transform the chair into a very compact package. For this purpose all foldable components of the chair are equipped with journals having journal axes extending perpendicularly to a vertical central plane of symmetry of the chair. Further, the seat is vertically liftable and also horizontally guided on guide tracks (18) extending in parallel to the plane of symmetry of the chair. The guide tracks (18) are movable back and forth on guide rail sections (17) which are pivoted to the top of the support structure (4) of the chair. Hydraulic piston cylinder drives are connected to all chair components which are movable under a loaded condition with a person sitting in the chair. The chair seat is also divided so that the chair may be moved directly over a toilet seat, for example.