FERRITIC STAINLESS STEEL MATERIAL, SEPARATOR FOR SOLID POLYMER FUEL CELLS WHICH USES SAME, AND SOLID POLYMER FUEL CELL

There is provided a ferritic stainless steel material that has a chemical composition containing, by mass%, C: 0.02 to 0.15%, Si: 0.01 to 1.5%, Mn: 0.01 to 1.5%, P: 0.035% or less, S: 0.01% or less, Cr: 22.5 to 35.0%, Mo: 0.01 to 6.0%, Ni: 0.01 to 6.0%, Cu: 0.01 to 1.0%, N: 0.035% or less, V: 0.01 to 0.35%, B: 0.5 to 1.0%, Al: 0.001 to 6.0%, rare earth metal: 0 to 0.10%, Sn: 0 to 2.50%, and the balance: Fe and impurities, in which a value calculated as {Cr content (mass%) + 3 × Mo content (mass%) - 2.5 × B content (mass%) - 17 × C content (mass%)} ranges from 20 to 45%, the ferritic stainless steel material further having a parent phase comprising only a ferritic phase, in which at least composite metallic precipitates including M 23 C 6 carbide-based metallic precipitates precipitated on surfaces and at peripheries of M 2 B boride-based metallic precipitates serving as precipitation nuclei are dispersed and exposed on a surface of the parent phase.