The present invention mowed grass during mowing work I provide with arrestor entanglement of grass clippings to prevent entangling the fixed portion of the bush cutter. The invention relates to a cylindrical vessel is opened to the upper surface, there are fitted narrowing holes 3 fitted convex portions of the cutting blade receiving fitting on the bottom, the gear case bottom circular portion in a state of being mounted on the brush cutter and the cutting blade and it has an inner diameter and height that wraps around the receiving metal at the same time that it has a flange 4 which is open upward to the inverted cone drives out angle identical or maximally approximating the mounting angle of the gear case and the pole on the upper edge It is characterized.BACKGROUND 2.【課題】草刈り作業中に刈草が刈払機の固定部に絡み付くのを防ぐ刈草の絡み付き防止器を提供する。【解決手段】円筒状の器であって上面に開口し、底面に刈刃受け金具の凸部が嵌入する嵌込み穴3があり、刈り払い機に装着した状態においてギヤケース下部円形部と刈刃受け金具を同時に包み込む内径と高さを有し、上縁部にはギヤケースとポールの取り付け角と同一若しくは可及的近似の角度を以って逆円錐形に上方に開口した鍔4を有することを特徴とする。【選択図】図2