To provide a wear ring excellent in load resistance and capable of reducing under cut as much as possible and a manufacturing method of the wear ring.

The wear ring 100 formed by injection molding comprises a cut part 110 at one place in the circumferential direction. The cut part 110 in the wear ring 100 formed by injection molding is composed of a first cut part 110a at the center part which is inclined to an axial direction C of a center shaft of the wear ring 100 as viewed from the outer peripheral surface side and the inner peripheral surface side, and a second cut part 110b and a third cut part 110c respectively provided on the both sides of the first cut part 110a and extended to the side surface of the wear ring 100. The second cut part 110b and the third cut part 110c are composed not to be inclined to the axial direction C.

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