Patent ID: 7338383

Claim:
A constant velocity joint boot, comprising: a boot body including a smaller cylindrical portion attachable to a shaft, a larger cylindrical portion disposed coaxially with and at a distance from the smaller cylindrical portion, being larger than the smaller cylindrical portion in diameter, and having a clamp groove on an outer peripheral surface, and a conical bellows portion connecting the smaller cylindrical portion and the larger cylindrical portion; and an annular grommet formed of a softer material than the larger cylindrical portion having a non-circular inner peripheral shape, the annular grommet including at least one sealing projection to be engaged with a mating member on an inner peripheral surface thereof, wherein the larger cylindrical portion and the grommet are arranged on the mating member, at least one positioning projection projects from the inner peripheral surface of the grommet and is engageable in a recess on an outer peripheral surface of the mating member, and the positioning projection is formed at an end of the grommet from which the mating member is inserted and has a minimum inside diameter portion located away from the clamp groove in the axial direction.