To provide a long-life and low-cost universal joint capable of improving lubrication constituent retention force of a foamed solid lubricant retaining a lubrication constituent, reducing an oozing amount of the lubricant due to deformation of the foamed solid lubricant or external force to necessary minimum, and supplementing a lubrication function even when the lubrication constituent from the foamed solid lubricant runs short.

In this universal joint, rotary torque is transmitted by engagement of track grooves 3 and 4 with a torque transmission member 5, and the torque transmission member 5 rolls along the track grooves 3 and 4 and thereby axial movement is carried out. In the universal joint, the formed solid lubricant 9 foaming in the universal joint and prepared by including a lubrication constituent in a resin foaming and solidifying to be converted into a porous body, and grease 10 for auxiliary lubrication coexist, and the grease 10 for auxiliary lubrication contains at least a wax having a melting point of 70-150C.