[A Problem to be Solved] A cutting blade piece protective structure that prevents an obstacle from coming into direct contact with a blade portion of a cutting blade piece, saving light weight, saving a replacement cost at the time of breakage, and inhibiting lawn mowing performance by the cutting blade piece, is provided.[Solution] In the lawnmower 1 including the blade disk 31 to be rotationally driven and at least one cutting blade piece 37 attached to the outer peripheral portion of the blade disk 31, a blade guard 38 for preventing an obstacle from coming into contact with the blade portion 39 of the cutting blade piece 37 is provided on the cutting blade piece 37. Preferably, the blade guard 38 is attachable to and detachable from the cutting blade piece 37.
