Roller bearing

A roller bearing comprising:

• an inner member;
• an outer member;
• rollers interposed between raceway surfaces of the inner member and the outer member and having a roller outer circumferential surface;
• a cage retaining the rollers;
• and
• a DLC film on at least one of the roller outer circumferential surface, the raceway surface of the inner member, or the raceway surface of the outer member, the DLC film including a metal layer or a layer of a metal, an intermediate layer containing the metal and DLC, and a superficial layer containing DLC, in the stated order starting from a side adjacent to a substrate, the intermediate layer having a bilayered structure of a top layer and a bottom layer, the top layer being a DLC-enriched layer having a greater content of DLC than the bottom layer, the bottom layer being a metal-enriched layer having a greater content of the metal than the top layer, and the metal-enriched layer having a layer thickness of between at least 100 nm and no more than 300 nm.