The present invention provides a conveying chain having a circular sealing component capable of inhibiting the external leakage of lubricating oil supplied to the peripheral region of a roller, as well as preventing the external foreign matters from intruding the peripheral region of the roller, and ensuring the long-term presence of lubricating oil, so as to easily achieve the installation of the circular sealing member onto a circular thrust bearing component. In the conveying chain 100 of this invention, the circular sealing component 180 tightly sealing the outer peripheral surface 170a of the circular thrust bearing component 170 for sealing the lubricating oil is disposed between the inner peripheral surface 130a of the roller 130 and the outer peripheral surface 170a of the circular thrust bearing component 170. A coated annular sealing cap 190, which is adjacent to the outer side of the chain width direction of the circular sealing component 180, is fittingly pressed into the inner peripheral surface 130a of the roller 130.