PURPOSE: To provide a superconductor magnet by opening the center of a single crystal cylindrical superconductor bulk material in which fine RE2BaCuO5 is dispersed, conducting the cutting to form a coil having a closed circuit to a part thereof and arranging current applying terminals at the upper and lower ends of the coil.

CONSTITUTION: A cylindrical bulk superconductor material 1 consisting of a single crystal RE (rare earth element including Y and combination thereof) Ba2Cu3O7-y wherein fine 211 phase is dispered into the 123 phase undergoes opening of hole 3 and the cutting process 2. In this case, three slits are provided with an equal interval and moreover a 4-turn magnet is manufactured in such a manner as forming a circular loop of the current path 4. Next, two current application terminals 4a, 4b are formed after evaporation of silver and are connected with a constant current power supply. Thereby, an oxide superconductor magnet can be manufactured.