An electrical wheelchair includes a vertical rotating shaft connected fixedly to a seat member and journalled on a frame of a chair body, and a worm unit for transferring rotation of a motor shaft to the rotating shaft. A wheel-controlling switch is disposed on the seat member, and is operable to rotate a driving wheel unit. A rotation-controlling switch is also disposed on the seat member, and is operable to rotate the rotating shaft and the seat member by any desired angle smaller than and equal to 360.degree.. When the seat member rotates from a frontward position by 180.degree., the rotational direction of the driving wheel unit is reversed under automatic control. As such, forward and rearward movement of the wheelchair can be conducted with ease.