The present invention also move the protection member along with the cutting blade during mowing work , less resistance of plants by protecting member , is extremely good workability and can manipulate the mower smoothly , and , soil and vegetation to the work s side with scattering , etc. can be prevented , the length of nylon blade provides a cutting blade protection member of the portable mowing machine can be cut depending on the type of obstacle to a predetermined length . A cutting blade 3 provided on the tip of the operating rod 2 is mounted on a mobile mowing machine reap grass rotating at engine , the protective member 5 for protecting the cutting blade , the outer peripheral ring 51 , and is disposed above a mounting board 52 having a mounting hole , and is at least composed of a plurality of connecting rod 53 for connecting between the outer ring and the mounting platen radially , and , the shielding plate 6 is attached to the bottom of the outer peripheral ring . [ Selection Figure Figure 2【課題】草刈作業中に刈刃と共に保護部材が移動しても、保護部材による草木の抵抗が少なく、草刈機をスムースに操作でき作業性が極めて良く、且つ、作業者側への土や草木などの飛散が防止出来ると共に、ナイロン刃の長さを、障害物の種類によって所定の長さに切り分けできる携帯草刈機の刈刃用保護部材を提供する。【解決手段】操作杆2の先端に設けた刈刃3が原動機で回転し草を刈り取る携帯草刈機に装着され、刈刃を保護する保護部材5が、外周リング51と、その上方に配置され取付穴を有する取付盤52と、外周リングと取付盤との間を放射状に連結する複数の連結棒53とから少なくとも構成され、且つ、外周リングの下部に遮蔽板6が取付けられている。【選択図】図2