Abstract: Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets. The magnet powder is prepared by melt-spinning of a molten alloy and nitriding the alloy powder thus obtained to form a magnet alloy having an alloy composition of one of the formulae, by atomic %: SmxFe100-x-vNv, SmxFe100-x-y-vM1yNv and SmxFe100-x-z-vM2zNv wherein M1 is at least one member selected from the group consisting of Hf and Zr; and M2 is at least one member selected from the group consisting of Si, Nb, Ti, Ga, Al, Ta and C; 7?x?12, 0.1?y?1.5, 0.1?z?1.0 and 0.5?v?20; the crystal structure is TbCu7 type; and the thickness of the flakes is 10-40 ?m.