To provide a scattered material protective cover for protecting damage of a human body, a garden tree, a crop or the like caused by a scattered material generated during mowing by a mower.SOLUTION: A downward horizontal gutter 2 for supporting and catching an operation shaft is set on the outside wall part of a light-metal or plastic cone-type scattered material protective cover 1, and then pushed forward into a catching cover. Thereafter, in the covered state with the cover, the operation shaft 7, a blade 6 and a string cutter are introduced, and the operation shaft is pushed into an insertion notch 3 and an introduction hole 4. When the blade is fixed on a stable position, an operation shaft tightening bolt 5 is tightened firmly.SELECTED DRAWING: Figure 1【課題】草刈機による草刈り草取り中に発生する飛散物による人体、植木作物等の損傷を防護する飛散物防護カバーを提供する。【解決手段】軽金属またはプラスチックの円錐型飛散物防護カバー1の外側壁部分に操作軸を支え受け留める下向横樋2を設定し受け留めカバー内に推し進める。次にカバーを被せた状態で操作軸7と刃6、紐カッターを導入し、操作軸を挿入切り込み3と、導入穴4に押し込む。刃が安定位置に確定したら操作軸締め込みボルト5を硬く締め込む。【選択図】図1