Patent ID: 7347787

Claim:
A joint boot comprising: a boot body including a large-diameter attachment part adapted to attach to an outer housing having a plurality of recessed portions in the circumferential direction thereof, a small-diameter attachment part adapted to attach to a shaft, and a bellows part integrally linking said small-diameter attachment part and said large-diameter attachment part; and a bushing adapted to be interposed between said outer housing and the large-diameter attachment part, said bushing having an inner peripheral surface adapted to be externally fitted and fixed to the outer housing and having an outer peripheral surface to which said large-diameter attachment part of said boot body is externally fitted, wherein said bushing has a circular form in cross-section on said outer peripheral surface thereof, wherein said bushing has a plurality of lobe portions on said inner peripheral surface thereof in a circumferentially distributed manner, said plurality of lobe portions being adapted to mate with said recessed portions; wherein the bushing has protrusions extending circumferentially on said inner peripheral surface adapted to mate with grooves extending circumferentially on an outer peripheral surface of the outer housing; wherein said large-diameter attachment part of said boot body is externally fitted to and in contact with said bushing with a clamping member in an external fitting area, and wherein the protrusions are disposed in said bushing in a position that is axially outside said clamping member and said external fitting area.