To provide a pulley made of a resin with a bearing which accurately makes reference surface and hardly produces any slippage (creep) without increasing processing man-hour.

In the pulley made of the resin with the bearing which is adapted to integrally mould the pulley made of the resin 2 on outer periphery of an outer ring 3 of the bearing, outer peripheral surface of the outer ring 3 of the bearing is formed of grinding surface and turning surface of non-grinding surface. In this case, the outer peripheral surface 3a of the outer ring 3 of the bearing is formed of a convex larger diameter and formed of other smaller diameter (3b, 3c), and forms one as the grinding surface and other as non-grinding surface.