The present invention realizes the miniaturization, the reduction of a weight and the compactification of a tiller per se. A tiller includes a support portion, a tilling shaft portion which is rotatably supported on the support portion, and a rotary drive portion which rotatably drives the tilling shaft portion. In such a constitution, the tilling shaft portion is configured such that a pair of left and right rotary support shafts is respectively mounted on a pair of left and right support members which is mounted on the support portion, a tilling shaft which is formed of a hollow member is rotatably and laterally extended between both rotary support shafts about an axis of the tilling shaft, and the rotary drive portion is arranged in the inside of the tilling shaft and, at the same time, the rotary drive portion is configured such that an electrically-operated motor is fixed to one rotary support shaft, a reduction gear mechanism is interposed between the electrically-operated motor and another rotary support shaft, and the reduction gear mechanism is interlockingly connected to the tilling shaft.
