SHAFT MEMBER FOR ROLLING BEARING DEVICE FOR WHEEL

A shaft member of a rolling bearing device for a wheel includes a shaft portion, a flange base portion, and a fitting shaft portion. A plurality of flange portions which extend radially outwards in a radial direction is formed on the flange base portion. Projecting portions which are webbed-shaped and project radially outwards are formed circumferentially on an outer circumferential surface of the flange base portion between the adjacent flange portions.