Problem: reduction of tilling performance due to the rotary tiller in the roll direction is suppressed.The rotary tilling apparatus comprises a plurality of tilling pawls 25 and a tilling claw shaft 24, and a plurality of pawl mounting portions 24C to which the tilling pawls 25 are mounted are distributed on the peripheral surface of the tilling claw shaft 24, and the plurality of claw mounting portions 24C have a pawl claw shaft The right and left claws arranged in the left and right sides of the tilling claw shaft 24 of the tilling claw shaft 24 are provided on the peripheral surface of the tilling claw shaft 24 with a phase difference in the circumferential direction and spaced apart in the axial direction of the tilling claw shaft 24, and of the plurality of nail fitting parts Toe24cb is arranged in the same phase in the circumferential direction of the tilling claw shaft 24.Diagram【課題】ロータリ耕耘装置がロール方向に揺動することに起因した耕耘性能の低下を抑制する。【解決手段】ロータリ耕耘装置は、複数の耕耘爪25と、耕耘爪軸24とを備え、耕耘爪軸24の周面に、耕耘爪25が取り付けられる複数の爪取付部24Cが分散して備えられ、複数の爪取付部24Cは、耕耘爪軸24の周方向に位相差を有するとともに耕耘爪軸24の軸心方向に間隔をあけた配置で耕耘爪軸24の周面に備えられ、複数の爪取付部24Cのうち、耕耘爪軸24における左右両端側の左右対称位置に配置された左右の爪取付部24Cbが、耕耘爪軸24の周方向に同位相で配置されている。【選択図】図4
