Anti-friction bearing

Provided is an anti-friction bearing such that the peel resistance of diamond-like carbon films formed on inner and outer raceways and cage sliding surfaces of the anti-friction bearing is improved, that as a result, the original properties of the diamond-like carbon films are displayed, and that thereby the anti-friction bearing excels in seizure resistance, wear resistance, and corrosion resistance. The anti-friction bearing (1) is equipped with an inner race (2), an outer race (3), a plurality of rolling elements (4), and a cage (5). Hard films (8) are formed on an inner raceway surface (2a), an outer raceway surface (3a), etc., which are curved surfaces. These hard films (8) are each configured in such a way as to consist of a foundation layer which is made primarily of chromium and is directly formed on the pertinent surface; a mixed layer which is made primarily of tungsten carbon and diamond-like carbon and is formed on the foundation layer; and a surface layer which is made primarily of diamond-like carbon and is formed on the mixed layer. The mixed layer is such that the content ratio of tungsten carbon decreases continuously or in stages from the foundation layer side to the surface layer side, and that the content ratio of diamond-like carbon increases continuously or in stages from the foundation layer side to the surface layer side.