To provide a joint sleeve sealed to a lubricant, and capable of sufficiently preventing intrusion of dirt to a joint from the circumference, and being easily manufactured.

In a sleeve including bellows composed of a rubber elastic material, the bellows is uniformly dispersed in the circumferential direction and has at least two bulging portions. Only one bulging portion per one place in the circumferential direction can exert a sufficient function. The bulging portion has at least two pocket-shaped bulging portions extending toward a radial inner side in the circumferential direction of an end face of the bellows, on one end face side, and includes two side portions disposed adjacent to each other at an interval in the axial direction. The bulging portions can be kept into contact with a pin configured to match the joint in a sealed state, and the bellows and the burling portions are formed in one piece and the same material.