Magnetic refrigeration material and magnetic refrigeration device

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Provided is a magnetic refrigeration material represented by the formula La1-fREf(Fe1-a-b-c-d-eSiaCobXcYdZe)13 (RE : at least one of rare earth elements including Sc and Y and excluding La; X : Ga and/or Al; Y : at least one of Ge, Sn, B, and C; Z : at least one of Ti, V, Cr, Mn, Ni, Cu, Zn, and Zr; 0.03≦a≦0.17, 0.003≦b≦0.06, 0.02≦c≦0.10, 0≦d≦0.04, 0≦e≦0.04, 0≦f≦0.50), and having an average crystal grain size of not smaller than 0.01 μm and not larger than 3 μm, a Curie temperature of not lower than 250 K, and the maximum (−ΔSmax) of magnetic entropy change (−ΔSM) when subjected to a field change up to 2 Tesla is not less than 5 J/kgK.