The invention relates to a working rig and aims to provides a working rig of a soil working device adopting a configuration that power transmission systems for transmitting power to three soil working rollers do not interfere with one another. the soil working device provided with a soil working roller (27a) at center and a pair of soil working rollers (27a) at right and left is equipped with a roller transmission shaft (72) for transmitting power to a driving shaft of the soil working roller (27a) at one side form one side of a running vehicle body, a first transmission mechanism (73a) for transmitting power to a driving shaft of the soil working roller (27b) at center form the driving shaft of the soil working roller (27a) at the side, and a second transmission mechanism (73b) for transmitting power to a driving shaft of the soil working roller (27a) at the other side form the driving shaft of the soil working roller (27b), and roller transmission shafts are arranged at arbitrary outside of the first transmission mechanism in left and right direction to configure at least one transmission shaft of the first transmission mechanism and the second transmission mechanism in a manner that the more the transmission shaft is near the front, the more the transmission shaft is near the inside on the left and right direction.
