Method for producing a rare-earth magnet

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A rare earth magnet may include a formed body having magnetic powder containing rare earth metal, the formed body being magnetized, a coating film which is formed on an outer face of the formed body, and a rust preventive treatment layer which is formed on a surface of the magnetic powder in a pore of the formed body. In a manufacturing method for a rare earth magnet, a forming step is performed in which a formed body having magnetic powder containing rare earth metal is formed, after that, a coating film forming step is performed in which a coating film is formed on an outer face of the formed body and, after that, a rust prevention processing step is performed in which rust preventive liquid is impregnated into the formed body.