< Topic > The installation component which is installed in the mowing blade, and the mowing blade which can suppress the being entwined of the grass is offered. Solutions As for mowing blade 1, installing in mowing machine, 3 being something which is used, abbreviation orbicular tabular computer section 11 and multiple blade sections 13 and, it possesses. As for mowing blade 1, around the perforation hole 21 relatively it is even, but as it faces on rim side, it buckles, directs to rim and it has become the tilt slant face which inclines to underneath. Further in details, in computer section 11 it buckles relatively, gently computer section in the concatenated place vicinity of 11 and blade section 13 buckles with relatively urgent angle. < Choice figure >Drawing 4【課題】 草の絡まりを抑制できる草刈刃、および草刈刃に取り付ける取付部材を提供する。 【解決手段】 草刈刃1は、草刈機3に取り付けて用いられるものであって、略円形の板状の本体部11と、複数の刃部13と、を有する。草刈刃1は、貫通孔21の周辺は比較的平坦であるが、外周側に向かうに連れて湾曲し、外周に向けて下側へ傾斜した傾斜面となっている。より具体的には、本体部11では比較的なだらかに湾曲し、本体部11と刃部13との連結箇所近傍で比較的急角度で湾曲する。【選択図】図4