To provide a rolling bearing having a cage of sufficient strength and durability even under its use in gear oil containing large amount of extreme pressure additive in high temperature state.

Material quality of a cage used in a rolling bearing is resin composition in which fine carbon fiber by 3 to 50 mass% is blended in polyphenylene sulfide resin, the fine carbon fiber is dispersed in nano-size to form a network structure. The fine carbon fiber is monolayer or multilayer carbon nano-tube and an electrical conductivity of resin composition is 10^-5 S/cm or more.