PURPOSE: To produce a product which has excellent ductility, malleability and bendability by filling the inside of a hollow supporting body with powder superconductive ceramic material, baking the supporting body so as to produce superconductive wire and coiling the wire.

CONSTITUTION: The inside of a hollow supporting body 2 composed of metal or metal compound is filled with superconductive ceramic material 3. As the superconductive ceramic material, copper oxide ceramics (A1-X, BX)YCuZOW is used, where, A=Y, Gd, etc., B=Ba, Sr, etc., X=0-1, Y=2.0-4.0, Z=1.0-4.0, W=4.0-10.0). Then, the supporting body 2 is baked to oxidize the ceramics and superconductive material is formed. Such process is repeated several times and superconductive ceramics 3 which has a hollow 4 in the hollow supporting body 2 is formed. Then, the whole body is drawn into wire and superconductive wire 1 is produced. Then the superconductive wire 1 is coiled.