To provide a rolling contact parts such as ball bearing for improving sound life.

A rolling element 4 is interposed between an inner ring 1 and an outer ring 2, and raceway surfaces 1a, 2a are formed on an circular arc shaped cross section having the radius of curvature near the radius of the rolling element 4 so as to form a rolling contact parts. A roughness average clearance in axial directions of the raceway surfaces 1a, 2a is set to 2 μm or more, and the magnitude of center line average roughness in the axial direction is set to 0.0000035 times or more and 0.0000075 times or less of a diameter of the rolling element 4.