To provide the magnetic bearing of a rotor shaft disposed opposite to a stator.

(a) The rotor shaft (1) is provided with permanent magnet elements (2) adjacently disposed in the range of the stator (3). (b) The stator (3) is provided with a structure (6a) comprising a superconducting material with a high Tc in the center and a central section. (c) The superconducting material with the high Tc is disposed in a cooling element (6) placed on the rotor shaft (1). (d) The cooling element (6) is a cooling groove (8) coaxially disposed on the rotor shaft (1) or formed on a large scale and contacts a cooling head. (e) The cooling element (6) is provided in a vacuum housing (5).