A
power transmission unit for a vehicle is provided. In the
power transmission unit, torque is transmitted between an input shaft and an output shaft through a
continuously variable transmission and a
gear train having an intermediate shaft. The
continuously variable transmission adapted to alter a speed ratio continuously is disposed between the input shaft to which a torque of a
prime mover is inputted and the output shaft that outputs the torque. The
gear train is adapted to establish a speed ratio that cannot be established by the
continuously variable transmission, and arranged at a different site from positions of the input shaft and the output shaft. The
power transmission unit comprises: a torque reversing device that is adapted to perform a differential action among an input element, an output element and a reaction element adapted to rotate the input element and the output element in opposite directions when rotation thereof is halted, and that is disposed coaxially with the output shaft or the intermediate shaft; a first
clutch device that connects at least any of two rotary elements of the torque reversing device; and a
brake device that halts rotation of the reaction element. The input shaft is connected with the output shaft through the continuously variable transmission, and a second
clutch device is disposed on a torque transmitting
route from the input shaft to the output shaft via the continuously variable transmission to allow and interrupt
torque transmission therethrough. The input shaft is connected with the output shaft through the
gear train and the torque reversing device.