The present invention relates to worry about stepping stone to provide a free and safe and easy mowing work is possible mowers in the separation zone of the highway. A mower 100 is a self-propelled lawn mower equipped with an engine, a main body 1 having running wheels 4, mounted on the side surface of the main body portion 1, with respect to the traveling direction of the main body 1 Te an arm 2 protruding laterally, and a cutter 3 cutting reciprocating attached to the arm 2, the cutting blade is superposed slidably extending direction of the arm 2 to the upper surface of the receiving blade of the reciprocating cutting blade 3 It is. .BACKGROUND【課題】高速道路の分離帯において飛び石の心配が無く安全且つ容易に草刈作業が可能な草刈機を提供する。【解決手段】草刈機100は、エンジンを搭載した自走式の草刈機であって、走行車輪4を有する本体部1と、本体部1の側面に取り付けられ、本体部1の進行方向に対して横に張り出したアーム2と、アーム2に取り付けられた往復式刈取刃3とを備え、往復式刈取刃3の受刃の上面に刈刃がアーム2の伸延方向に摺動可能に重ね合わせられている。【選択図】図1
