The present invention provides a grass leaf scattering prevention device for a grass mower. The grass leaf scattering prevention device for a grass mower comprises: a main body which has a blade embedded therein and is mounted on a shaft of a grass mower to rotate； a cover mounted on the main body； and a grass leaf scattering prevention plate formed between the main body and the cover. An insertion groove is formed on one side of the main body. A protruding unit corresponding to the insertion groove is formed on one side of the cover. A through hole corresponding to the protruding unit of the cover is drilled on the grass leaf scattering prevention plate to mount the grass leaf scattering prevention and the cover when the main body is mounted on the shaft of the grass mower. The grass leaf scattering prevention plate is formed on the cover and the main body directly mounted on the shaft of the grass mower to mount them together at once to facilitate manufacture and simplify a structure to reduce manufacturing costs and minimize concern for a failure. Also, the grass leaf scattering prevention plate blocks grass leaves cut by the blade and scattered and foreign substances hitting the blade and bouncing off the blade to safely protect a worker and minimize a disturbance element for grass mowing work. A protrusion or a wing is formed on one side of the grass leaf scattering prevention plate to raise the grass leaf scattering prevention plate to feel the weight of the grass mower less when performing grass mowing work to promote work convenience.본 발명은 칼날을 내장하고 예초기의 축에 결합되어 회전하는 본체와, 상기 본체에 결합되는 커버와, 상기 본체와 커버 사이에 풀잎비산방지판을 형성하되, 상기 본체의 일측에 삽입홈을 형성하고, 커버의 일측에는 상기 삽입홈에 대응하는 돌출부가 형성되며, 풀잎비산방지판에는 상기 커버의 돌출부에 대응하는 통공이 천공되도록 하여 본체가 예초기의 축에 결합될 때 상기 풀잎비산방지판과 커버도 함께 결합되도록 구성되는 예초기용 풀잎 비산방지장치를 제공하기 위한 것으로, 본 발명의 효과로는 예초기의 축에 직접 결합되는 본체와 커버에 풀잎비산방지판을 형성하여 한번에 이들을 결합함으로써 제작이 용이하고 구조가 간단하여 제작비용의 절감이 가능하고, 고장의 우려를 최소화할 수 있다.또한 본 발명은 칼날에 의해 절단되어 비산되는 풀잎과 칼날에 맞고 튕기는 이물질들을 풀잎비산방지판이 차단
