The driving force from a drive source is transmitted from a main input shaft to a continuously variable transmission mechanism through an input switching mechanism and a first input path in which a first speed-reducing gear is disposed, and is further transmitted to a first output path in which a second speed-reducing gear is disposed, thus establishing a LOW mode. And the driving force is transmitted from the main input shaft to the continuously variable transmission mechanism through the input switching mechanism and a second input path in which a speed-increasing gear, and is further transmitted to a second output path in which a third speed-reducing gear, thus establishing a HI mode. The first speed-reducing gear on the input side, the speed-increasing gear on the input side and the second and third speed-reducing gears on the output side are independent from each other.