AUTOMATIC TRANSMISSION

PROBLEM TO BE SOLVED: To provide an automatic transmission which achieves multistage transmission comprising a planetary gear set having five rotational elements, three clutches and three brakes, wherein the automatic transmission can be made compact, and lighter in weight.SOLUTION: An automatic transmission 1comprises a planetary gear set PS, first to third clutches C-1 to C-3, first to third brakes B-1 to B-3, and a counter gear 100 for outputting gear-shifted rotation. The counter gear 100 is disposed to one side of the planetary gear set PS in the axial direction, and the second brake B-2 is disposed to the opposite side of the planetary gear set PS in the axial direction, with respect to the counter gear 100. The second brake B-2, which never has a higher rotation rate in comparison to the other clutches and brakes, can be disposed away from the planetary gear set PS, while the other clutches and brakes and the counter gear 100 can be disposed in proximity to the planetary gear set PS, and thicker members can be made shorter, so that more compactness, and light weight are achieved.