PROBLEM TO BE SOLVED: To provide a bush cutter capable of reducing vibration and noise by a simple and inexpensive structure.SOLUTION: The bush cutter includes a drive gear connected to a drive shaft, a driven gear to be engaged with the drive gear, and a driven shaft to which the driven gear is attached. The driven gear is supported in such a way as movable in the axial direction of the driven shaft, and a rotation transmitting means is disposed between the driven gear and the driven shaft. A positioning means for limiting the amount of movement of the driven gear in the axial direction is disposed in the driven gear or in the driven shaft, and an elastic member is disposed in the axial direction of the driven gear.COPYRIGHT: (C)2012,JPO&INPIT【課題】 簡便且つ安価な構成にて振動,騒音を低減することができる刈払機を提供すること。【解決手段】 駆動軸に接続された駆動歯車と、駆動歯車と噛み合う従動歯車と、従動歯車が取り付けられた従動軸を有し、従動歯車を従動軸の軸方向に移動可能に支持するとともに、従動歯車と従動軸の間に回転伝達手段を設け、従動歯車の軸方向の移動量を制限する位置決め手段を従動歯車あるいは従動軸に設け、従動歯車軸方向に弾性部材を配設する。【選択図】 図2