PROBLEM TO BE SOLVED: To provide a herbicidal cutter that has high versatility and that hardly gives damage to farm crops and the like.SOLUTION: A herbicidal cutter 10 is for cutting weeds by connecting to a rotation output part 69 of a rotary driving device, including a cutter body 20, a cover 30 for covering the cutter body from above, and a fastener 40 for fastening the cutter body 20 and the cover 30 to the rotation output part 69. The cover 30 comprises: a part to be fastened 32 which is fastened to the rotation output part 69 together with the cutter body 20 a cover body 34 which is arranged on the outside in the rotation radial direction and which has an outer peripheral surface for preventing the cutter body 20 from coming into contact with an object other than herbicidal targets by being positioned further outer side from the end in the outside of the rotation radial direction of the cutter body 20 and a bearing 36 which allows relative rotation of the part 32 to be fastened and the cover body 34.COPYRIGHT: (C)2016,JPO&INPIT【課題】汎用性が高く、農作物等へのダメージを与えにくい除草用カッタを提供する。【解決手段】除草用カッタ10は、回転駆動装置の回転出力部69に連結されて草を刈り取るもので、カッタ本体20と、これを上側から覆うカバー30と、カッタ本体20及びカバー30を回転出力部69に締結する締結具40と、を備える。カバー40は、カッタ本体42とともに回転出力部69に締結される被締結部42と、その回転半径方向外側に配置されるとともに、カッタ本体20の回転半径方向外側の端部よりもさらに外側に位置することにより当該カッタ本体20が除草対象以外の物と接触するのを阻止する外周面を有するカバー本体34と、被締結部32とカバー本体34との相対回転を許容する軸受36と、を有する。【選択図】図2