PROBLEM TO BE SOLVED: To provide a lightweight rotary blade for bush cutters being usable for a long period of time, formed by providing multiple blade parts across the entire circumference of an outer peripheral edge of a disk-shaped pedestal formed of a synthetic resin.SOLUTION: The rotary blade for bush cutters includes: an insertion hole 3 for inserting a drive shaft of a bush cutter, at a central part of a disk-shaped pedestal 1 formed of a synthetic resin and multiple blade parts 2 formed across the entire circumference of an outer peripheral edge of the disk-shaped pedestal 1. The blade parts 2 may be defined as double edges 4. As for the blade parts 2, a recess 5 is formed at a circumferential central part of each blade part 2, and a groove is formed at a thickness-directional central part of each blade part 2 along the circumferential direction. A cemented carbide tip is fitted in each recess 5. A circular cord in which cemented carbide tips are inserted at prescribed intervals is fitted in the grooves.
