To eliminate defective rolling of a conveyor chain having a roller incorporating cylindrical rollers due to external fitting of cylindrical rollers on the roller.

With the conveyor chain having a roller, cylindrical rollers 14A, on each of which a pair of cylindrical spacing retaining rings 17 are rotatably fitted, and cylindrical rollers completely having no retaining ring 17, are alternately arranged, and the retaining rings 17 are allowed to externally contact the adjacent cylindrical rollers 14B. The cylindrical roller-rolling surfaces 13A, 15A which hold a pair of retaining rings 17 between their facing surfaces, are projectingly formed in ring-shaped manner respectively on the outside peripheral surface of a bush 13 and on the inside peripheral surface of a roller 15.