PURPOSE: To contrive to make a magnetic anisotropy have in the direction of a temperature gradient by a method wherein while a molten part and a solidified part have a boundary between them and are made the temperature gradient have, the molten part is solidified by cooling and is cast.

CONSTITUTION: An Sm2Co17 alloy raw material, which consists of 10 to 14 atm % of Sm, 10 to 40 atm % of Fe, 3 to 6 atm % of Cu and 1.2 to 2.5 atm % of Zr with the remnant of Co, is molten by high-frequency heating. Then, after the molten alloy raw material is made to solidify in a crucible, one part of the solidified alloy raw material is remolten using a Bridgeman device. At this time, as there is a temperature difference between the molten part and the solidified part, a boundary surface is generated in the vicinity of a solidifying temperature and the molten and solidified parts are brought in a state that they have a temperature gradient extending over from the center part of a high temperature of the molten part to the solidified part. While a melting temperature at this time is kept constant, the molten part is moved, is made to solidify by cooling and is cast and after that, a homogenizing treatment and a heat treatment are performed. Thereby, a magnet alloy having a magnetic anisotropy can be manufactured without using a powder sintering method.