PROBLEM TO BE SOLVED: To provide a rotary blade for mower with a thin plate-like rotary blade, which has excellent cutting sharpness, can prevent pebbles from scattering, and has excellent operability.SOLUTION: A rotary blade 10 for mower comprises a plurality of cutting blades 12a-12x at an outer periphery of a thin plate-like substrate 11. By arranging at least one part of the adjacent cutting blades in such a way that a rotary track of the adjacent cutting blade gradually becomes different positions in an upward direction and/or a downward direction of a rotary shaft of the rotary blade, it is possible to prevent pebbles from scattering, avoid the cutting blades digging into the ground, and have excellent cutting sharpness.COPYRIGHT: (C)2015,JPO&INPIT【課題】薄板状の回転刃を備える草刈機において、切れ味が良く、小石の飛散を防止可能で操作性に優れる草刈機用回転刃を提供する。【解決手段】本発明の草刈機用回転刃10は、薄板状の基体11の外周に複数の切断刃12a~12xを備え、隣接する切断刃の少なくとも一部を、該隣接する切断刃の回転軌道が回転刃の回転軸の上方向及び/又は下方向に徐々に異なる位置となるように配置したことにより、小石等の飛散を抑制することができ、切断刃が地面へ食い込みにくく、切れ味の優れたものとなる。【選択図】図1
