PURPOSE: To provide a large-diameter superconducting cylindrical substance manufacturable in a short time easily.

CONSTITUTION: A plurality of split substances made out of superconductors are joined and assembled through the medium of conductive fixing frames 4 having side-slippage preventing holding-by sandwiching parts 6, and a cylindrical substance 2 is formed. As a result of this, it becomes possible to enhance workability in the case of manufacturing a superconducting cylindrical substance, and it also becomes possible to prevent the split substances 3 from slipping at the joined parts.