To provide a four-wheel-drive small rotary tiller driven using mechanism simpler than a passenger small rotary tiller to drive front wheels, rear wheels and a rotary tilling device by an engine, in the four-wheel-drive small rotary machine having driving force greather than a two-wheel-drive so as to reduce operator's labor with a pedestrian small rotary tiller.

The small rotary tiller is provided with the engine 4 as a drive source, a rotary 13 and a running wheels 31 and 51. The running wheels are comprised of the front wheels 31 and the rear wheels 51. The rotary 13 and the front wheels 31 are driven via a transmission case 2 from the engine 4, and a drive shaft of the rear wheels are interlocked and connected to an output shaft 53 of a motor 52, and can be driven corresponding to the rotation of the front wheels 31. Wheels 51 are provided right and left in pair, and the motors 52 are interlocked and connected to the right and left rear wheels respectively.