VEHICLE WHEEL BEARING DEVICE

[Object] A wheel bearing apparatus is provided which can prevent an edge road of a contact ellipse of a ball and improve noise level and life of the bearing. [Solution] In the wheel bearing apparatus configured of a double row angular contact ball bearing, a height of a shoulder of a shoulder portion 18 of an outer member 12 with respect to a ball diameter of a double ball 14 row is set to be in a range of 0.35 to 0.50. A corner 19 of the shoulder portion 18 is configured of a relief surface 19a which is formed in a straight line that is a tangent line of an outer raceway surface 12a, and a chamfered portion 19b which is round in a circular arc having a predetermined radius of curvature r. The corner 19 is formed simultaneously by a formed grinding wheel forming the double row outer raceway surface 12a and formed smoothly continuous from each outer raceway surface 12a. A length in the radial direction of the relief surface 19a is set to be greater than or equal to 0.2 mm.