Abstract: The invention relates to a wheelchair, provided with a seat at a first level and a backrest, supported by an undercarriage, and at least one armrest, located at a second level, above said first level, wherein a mechanical arm is provided, comprising a series of segments, driven by at least one motor, wherein the mechanical arm is foldable and/or retractable into a position wherein the mechanical arm extends virtually completely below said armrest, preferably completely below said second level or virtually completely behind or next to the backrest, at least such that, in folded and/or retracted position, the mechanical arm is virtually completely inside an outer contour of the wheelchair.