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R-T-B sintered magnet comprising 12 to 17 atom% rare earth element (R), 5.0 to 8.0 atom% boron (B), 0.02 to 0.3 atom% Mn and the balance transition metal (T). The rare earth element (R) is at least one member selected from among rare earth elements including Y(yttrium), wherein 0.2 to 10 atom% Pr is contained. The element of transition metal (T) contains Fe as a main component.