To improve collection efficiency of the braking energy, while suppressing increase of the physique.

An engine 51, a first motor/generator 52 and a second motor/generator 53 include a sun roller 11, a first rotating member 12, a second rotating member 13 and a plurality of planet ball 14 as individually and respectively connected rotation members. When performing braking traveling, and when full braking power is larger than the input upper limit power of the battery, the difference of the full braking power with the collection power collected to the battery by the second collected motor/generator 53 is collected in a rotor 52a of the flywheel all-in-one design of the first motor/generator 52 as an inertia energy by collecting a part of the full braking power with the upper limit of the input upper limit power in the battery by the regenerative drive of the second motor/generator 53, and speed increase of the first motor/generator 52 by the tilting control of each planet ball 14.