PROBLEM TO BE SOLVED: To provide a cutter protective cover capable of improving durability of a cutter and enhancing work efficiency.SOLUTION: A cutter protective cover 3 is provided separately from an upper surface of a cutter attached in a tip of an operation rod of a bush cutter. The cutter protective cover 3 includes a cover body 1 fastened in the tip of the operation rod, a plurality of protective projections 2 extending in a comb shape from the cover body 1 to a radially outside of the cutter. Each protective projection 2 has a cross section formed in a reversed V shape.