Each of an outer ring, an inner ring, and a ball is a rolling contact member formed of a β-sialon sintered body inexpensive, capable of reliably ensuring sufficient durability, and capable of being used in an application where an imposed load is changed abruptly. The sintered body contains as a main component β-sialon represented by a compositional formula of Si6-ZAlZOZN8-Z and satisfying 0.1≦z≦3.5, and has a remainder formed of an impurity. The rolling contact member has a Young's modulus of 180 GPa or greater but 270 GPa or smaller.