The present invention provides hard coating film which excels conventional surface coating layer in wear resistance, has lower frictional coefficient and better slideability, a material coated with the hard coating film, a die for cold plastic working, and a method for forming the hard coating film. The hard coating film according to the present invention is a hard coating film comprising (NbxM1−x)y(BaCbN1−a−b)1−y, where 0.2≦x≦1.0  Equation (1) 0≦a≦0.3  Equation (2) 0≦1−a−b≦0.5  Equation (3) 0.5≦b=1  Equation (4) 0.4≦1−y≦0.9  Equation (5) [however, M denotes at least one species of elements belonging to Groups 4a, 5a, and 6a and Si and Al; x, 1−x, a, b, and 1−a−b represent respectively the atomic ratio of Nb, M, B, C and N; and y and 1−y represent respectively the ratio of (NbxM1−x) and (BaCbN1−a−b).]