Wheelchair of which a sitting support is pivotable about a virtual or non-virtual pivot axis, extending substantially horizontally, substantially at right angles to a main driving direction of the wheelchair, wherein the upper part of the body of the user, at least its center of gravity, viewed in the main driving direction, lies behind the pivot axis and wherein the pivot axis is located preferably adjacent the hinge point of the knees of a user seated in the wheelchair during use. The sitting support may be freely pivotable about said pivot axis or be fixed at a particular pivot angle. The pivot axis can for instance be designed as a torsion bar.