PROBLEM TO BE SOLVED: To provide an axle attachment structure of a tillage rotor capable of suppressing adhesion of soil or winding of grasses to a linkage projection and the axle during a tillage work.SOLUTION: In the state where a rotor body 11 is linked to an axle 8, a shaft cover 20 for enclosing in the circumferential direction, the outer peripheral side of the axle 8 and a linkage projection 11e is provided between a transmission case 4 and the rotor body 11. Hereby, since winding of grasses to the linkage projection 11e and the axle 8 can be suppressed during a tillage work, work efficiency of the tillage work can be improved.SELECTED DRAWING: Figure 5