PURPOSE: To provide the subject tilling device capable of carrying out tilling operation while properly advancing a machine body without causing dash phenomena.

CONSTITUTION: A tilling shaft 6 is inserted and supported on central holes of right and left holders 3 to be fixed to a tilling case 1 and long tilling cylinders 30 are engaged and fixed to the right and the left of the tilling shaft 6. Supporting cylinder parts 3a of the holders 3 are rotatably equipped with short tilling cylinders 13 outwards and the interiors of the short tilling cylinders 13 and the tilling case 1 are independently sealed with an oil and lubricated. The short tilling cylinders 13 are rotated and driven in the opposite direction based on the long tilling cylinders 30 by power transmitted from a main transmission mechanism 4 through a final transmission part 20.