A negative electrode active material for a secondary battery including an artificial flake graphite A and an artificial lump graphite B and having a ratio D50(A)/D50(B) of 50% particle diameter D50(A) of the artificial flake graphite A in a volume-based particle size distribution to 50% particle diameter D50(B) of the artificial lump graphite B in a volume-based particle size distribution is more than 0.6 and less than 1.0. The artificial flake graphite A has a surface roughness R of not less than 2.8 and not more than 5.1, the artificial lump graphite B has a surface roughness R of not less than 6.0 and not more than 9.0, and a ratio B/(A+B) of a mass of the artificial lump graphite B to the total mass of the artificial flake graphite A and the artificial lump graphite B is not less than 0.03 and not more than 0.30.