FRICTION ROLLER TYPE REDUCTION GEAR

PROBLEM TO BE SOLVED: To obtain a structure that obviates strict restriction on the dimension precision of each member of a friction roller type reduction gear and reduces manufacturing costs.SOLUTION: Projections 58, 58 are formed, respectively, at a plurality of portions at regular intervals in the circumferential direction of an outer circumferential surface of an annular roller 14b and to the outer circumferential surface of the annular roller 14b including the projections 58, 58, and fluororubber is bonded by vulcanization as an elastic member 72. The annular roller 14b and a holding cylindrical part 53 are supported elastically via the fluororubber that is the elastic member 72. Each of the projections 58, 58 is engaged with all or part of recessed parts 56, 56 of the recessed parts 56, 56 at the inner circumferential surface of the holding cylindrical part 53.