HYBRID-DRIVE DEVICE

In a hybrid drive device, an input shaft is connected to an engine, an output shaft is connected to wheels, and a wheel drive motor is connected between the input shaft and the output shaft. The hybrid drive device includes: a friction engagement element that is provided between the input shaft and the output shaft and of which transfer torque is controllable; and a control device that controls the friction engagement element. The control device reduces the transfer torque of the friction engagement element under a predetermined condition.