Abstract: A support unit is used for supporting a display device having a displaying face, and includes an axle mounted rotatably on a seat. The axle defines a first axis that is parallel to the displaying face, and has a cylindrical outer surface surrounding the first axis. The axle is rotatable about the first axis relative to the seat. A coupling unit interconnects the display device and the cylindrical outer surface of the axle in a manner such that the display device is rotatable relative to the axle about a second axis that is transverse to the first axis and the displaying face. An upright support member supports the seat from below in such a manner that the seat is turnable relative to the upright support member about a third axis transverse to the first and second axes.