PROBLEM TO BE SOLVED: To provide a bush cutter capable of eliminating the jamming of grass or lawn in a cylindrical portion formed on the inner face of the circumferential wall of the front end housing of a cutter unit toward a blade receiver.SOLUTION: A bush cutter 10 comprises a cutter unit 20 mounted on a front end portion of a support lever 11, and is equipped at a peripheral wall lower portion of the front end housing 21 of the cutter unit 20 with: a cylindrical portion 21b formed to protrude toward a blade receiver 24 and capable of inserting a rod-shaped tool thereinto and a recess 24a formed in the outer circumference of the blade receiver 24 and retained on a rod-shaped tool inserted from the cylindrical portion 21b for stopping the rotation of the rotary shaft 23b. A downward opening 21c is formed in the lower portion of the peripheral wall of the cylindrical portion 21b.COPYRIGHT: (C)2014,JPO&INPIT【課題】カッタユニットの前端ハウジングの周壁の内面に刃受具に向けて突出して形成した筒部内の草や芝の詰まりを解消できる刈払機を提供する。【解決手段】刈払機10は、支持棹11の前端部に設けたカッタユニット20とを備え、カッタユニット20の前端ハウジング21の周壁下部には刃受具24に向けて突出して形成され、棒状の工具を挿通可能な筒部21bと、刃受具24の外周部に形成され、筒部21bから挿通される棒状の工具に係止して回転軸23bの回り止めをするための凹部24eとを設け、筒部21bの周壁下部には下方に開口する開口部21cを形成した。【選択図】図3