Abstract: An outer ring for a wheel bearing is provided. The outer ring is designed to attain optimal structural strength and thus prolong a service life of the bearing by establishing theory foundation for dimensions of a supporting end formed on an outer side of an outer diameter surface of the outer ring and a ring groove in which the snap ring is installed which is formed on an inner side of the outer diameter surface and applying optimal dimensions within an allowable threshold range to the supporting end and the ring groove. In addition, the outer ring is also designed to improve space usability of the outer ring by attaining an installing space of a seal member installed on the bearing through an extending end formed on an outer front end surface of the outer ring and improve an assembling property of a snap ring by making a portion of the outer ring from a ring groove to an inner front end as a step surface whose diameter is less than an overall diameter of the outer ring.