To provide a wheel bearing that achieves compactness and low cost, and prevents both preload decline and bearing creep due to temperature rise.

There are provided an annular convex portion 17 which has an annular concave portion 18 on a central portion of an outer circumference, protrudes inward in a radial direction and whose inner diameter is flat, an outer member 12 whose double rows of arc-shaped outer rolling surfaces 12a are integrally formed on both sides of the annular convex portion, an arc-shaped inner rolling surface 13a on the outer circumference that opposes the double rows of outer rolling surfaces 12a, a pair of inner wheels 13 on which a shoulder portion 20 is formed so as to extend from a large diameter side in an axial direction, and a double rows of balls 15 that are housed between both rolling surfaces, wherein the pair of inner wheels 13 includes a double rows of angular ball bearings of rear surface facing type that are given a bearing preload in a state where small-diameter side end surfaces 13b butt in an opposing state, the outer member 12 and the inner wheel 13 are made of a pipe member by plastic forming, and the annular concave portion 18 is filled with a resin band 21 that is made of a heat-resistant synthetic resin by injection molding.