An object of the present invention is with the sharpness of the cutting blade can be a long life in the disk-shaped cutting blade, it is to provide a cutting blade for safe brush cutter. In A disk-shaped cutting blade 1 for a brush cutter, so as to form a serrated 5 on at least one side of the cutting blade 3 projecting radially from the substrate 2 of the disc-shaped cutting blade 1, and the It was the tip of the cutting edge 3 in a trapezoidal shape by forming a chamfered portion 6 at the tip sides of the cutting edge 3. .BACKGROUND【課題】円板状切刃において刈刃の切れ味を長寿命にすることができるとともに、安全な刈払機用刈刃を提供する。【解決手段】刈払機用の円板状刈刃1において、前記円板状刈刃1の基板2より放射状に突設した少なくとも1個の切刃3の側面に鋸歯5を形成するとともに、前記切刃3の先端両側に面取り部6を形成することで前記切刃3の先端を台形形状にした。【選択図】図1
