The vehicle, for example a stand-up wheelchair, comprises a frame (11) and, arrangedon the latter, a seat device (19). On each side of the frame (11), the central wheel(13), which can be driven by a motor (27), and the front wheel (15) are operativelyconnected to each other by an endless chain (45). The frame (11) has a front part(21) and a rear part (23), which are connected to each other in an articulated mannerby way of a joint (25). In the sitting position, the front wheels (15) are not incontact with the ground, which means that they do not obstruct the manoeuvringof the vehicle in a confined space. In the standing position, the front wheels(15) are in contact with the ground, but the central wheels (13) are not. The user,in the standing position, is thus able to turn about the axis of the vehicle, withoutthe central wheels (13) having a blocking action.
