PROBLEM TO BE SOLVED: To provide a cutting blade of a mower, the blade that can cut away even low height grass and the thick and hard grass with high height, and facilitates replacement of a portion of the blade for cutting the grass.SOLUTION: A cutting blade of a mower includes a rotating disk with an attachment hole to a rotating shaft of the mower in the center thereof, a cut-away plate attachable in the longitudinal end of the rotating disk, and a blade body attached to the cut-away plate and protruded to the peripheral outward direction of the rotating disk. The blade body is made of metal having high hardness and high toughness. The cut-away plate has a substrate part and a standing part, and substantially L-shaped when viewed from the front. The standing part is attached to the rotating disk horizontally in a turning manner toward the peripheral outward direction of the rotating disk.SELECTED DRAWING: Figure 1【課題】 背丈の低い草も、背丈が高く太くて硬い草も刈り払いすることができ、且つ、草を刈る刃の部分の交換が容易な草刈機の刈刃を提供すること。【解決手段】 草刈機の刈刃は、草刈機の回転軸への取り付け孔を中心に備える回転盤と、回転盤の長軸方向端部に取り付けられる払い板と、払い板に取り付けられ、回転盤の周縁外方向に突き出す刃体と、を備え、刃体は、硬度が高く、且つ、靭性の高い金属製のものであり、払い板は、基板部と、立設部と、を有し、正面視すると略Ｌ字形状であり、立設部は、回転盤の周縁外方向に向けて、水平方向に回動可能に回転盤に取り付けられている。【選択図】図１
