PROBLEM TO BE SOLVED: To provide a mowing machine capable of removing mowing grass attached to a dustproof cover covering an intake part of a prime mover without manpower and saving labor for removing mowing grass. A grass mower includes a prime mover, a cutting blade that rotates by the power of the prime mover to mow grass, a breathable dust cover that covers an intake portion of the prime mover, and a mowing grass that adheres to the surface of the dust cover. A scraper that is removed by rotation and a power transmission unit that transmits the power of the prime mover to the scraper as a rotational driving force of the scraper are provided. [Selection diagram] Fig. 17【課題】原動機の吸気部を覆う防塵カバーに付着した刈草を人手に依らずに除去することができ、刈草の除去作業の手間を省くことが可能な草刈機を提供すること。【解決手段】草刈機は、原動機と、前記原動機の動力により回転して草を刈る刈刃と、前記原動機の吸気部を覆う通気性の防塵カバーと、前記防塵カバーの表面に付着する刈草を回転により除去するスクレーパと、前記原動機の動力を前記スクレーパの回転駆動力として前記スクレーパに伝達する動力伝達部と、を備えている。【選択図】図17