MOTIVE-POWER TRANSMISSION DEVICE

A power transfer device 20 includes a hydraulic clutch 80 capable of coupling and decoupling a secondary shaft 44 of a CVT 40 and axles 79 to and from each other. A secondary pulley 45 of the CVT 40 includes a movable sheave 452 movably supported by the secondary shaft 44, and a secondary piston 51 that rotates together with the secondary shaft 44 and that constitutes a second hydraulic actuator 48 together with the movable sheave 452. The secondary piston 51 of the second hydraulic actuator 48 is used to define an engagement oil chamber 87 of the hydraulic clutch 80.