PURPOSE: To enable production of a powder molding consisting of an Ni-Ti alloy having high precision in an assembly grade by adding powder of Ni or Ti at a specific value or below according to the compsn. of the Ni-Ti alloy to the powder of said alloy and molding the mixture under pressure.

CONSTITUTION: Ni pellets and sponge Ti are mixed and the mixture is melted in a gaseous Ar atmosphere in a plasma melting furnace in the stage of producing an Ni-Ti shape memory alloy contg. 56% Ni and 44% Ti. The molten metal is dropped onto a disc under high-speed rotation and is thus scattered, by which the powder of the Ni-Ti alloy is produced. The compsn. of the powder alloy is analyzed and the insufficient component in the compsn. deviated from the above- mentioned compsn. is added in the form of hydride to the alloy in a ≤10% range to adjust the components. The alloy is directly rolled with rolling rolls, by which the plate-shaped molding of the Ni-Ti alloy having high precision with respect to the target compsn. and having an excellent shape memory characteristic is produced.