Abstract: In order to provide a one-way clutch-containing rotation transmission apparatus of a high performance and an excellent durability, which shows a satisfactory lubricating property in a one-way clutch and a rolling bearing over a wide temperature range from a low temperature to a high temperature, in which an antirust agent for preventing a corrosion by rainwater or the like has little environmental burden and which does not cause an exfoliation of metal materials under a vibrating condition, a grease composition, employing a synthetic oil as a base oil, also employing at least either of an urea compound and a metal soap as a thickener and containing a non-barium type antirust agent in an amount of from 1.0 to 10 mass % with respect to the entire amount of the grease, is sealed in the rolling bearing and the one-way clutch.