PROBLEM TO BE SOLVED: To reduce a load even when a lump of soil is generated during tilling.SOLUTION: An arrangement structure of tilling claws on a tiller comprises: a rotary shaft； plural flanges which are arranged in an axis center direction of the rotary shaft with an interval； and plural tilling claws which can be attached to the flanges. The plural tilling claws are attached to the flange so that a first interval between the facing tilling claws which are attached to a certain flange and an adjacent flange, and a second interval between the facing tilling claws which are attached to the certain flange and another adjacent flange, are different.SELECTED DRAWING: Figure 1【課題】耕耘時に土等の塊ができた場合にも、負荷を低減することができるようにする。【解決手段】回転軸と、回転軸の軸心方向に間隔をおいて設けられた複数のフランジと、フランジに取り付け可能な複数の耕耘爪と、を備えた耕耘機における耕耘爪の配列構造であって、複数の耕耘爪は、隣接するフランジに取り付けられた互いに向き合う耕耘爪における第１の間隔と、隣接する他のフランジに取り付けられた互いに向き合う耕耘爪における第２の間隔とが異なるように、フランジに取り付けられている。【選択図】図１
