To provide a multifunctional wheelchair with an inner frame to ease engagement of a chair stand, to reduce labor to erect an upright frame from a bed state to chair shape, and to reduce labor to uplift the chair stand.

A supporting rod 11 is stood inside an outer frame B. A ring shape engaging projection 6 is mounted in front and rear outside a sitting stand 13. An operating rod is mounted with a slipping and inserted projection 7, and is connected freely slidably under the sitting stand. A ring shape engaging projection undersurface is engaged with a supporting rod upper surface by way of the slipping and inserted projection, a chair stand engaged. A rotating shaft mounted over an upright frame 5 and an upright frame rotating wheel mounted under the upright frame 5 are connected to each other with an erecting string, a backrest axis is mounted over a backrest, and the upright frame is erected by rotating the rotating shaft.