A final drive device is provided with, inside a housing, a final drive gear mechanism comprising a drive pinion and a ring gear meshed with the drive pinion, and a differential gear mechanism comprising a pinion rotatably supported by a pinion mate shaft and a pair of side gears meshed with the pinion from both sides in an axle direction. The final drive device has a pinion carrier which is rotated in a direction around the axle integrally with the pinion mate shaft supporting the pinion, and which is secured to the ring gear. The pinion carrier is provided with a pinion housing unit housing the pinion while permitting the pinion to rotate around its own axis. The pair of side gears meshed with the pinion is fixedly located relative to the housing while being permitted to rotate around their own axes.
