To provide a blade allowing improvement of durability by more effectively preventing wear of a substrate.

This blade C is provided with: an abrasive grain layer 2 on an outer peripheral side of the substrate 1 formed into a substantial disk-shape; and a plurality of slits 3 formed toward the radial inside on the outer peripheral side of the substrate 1. A wear resistant member 6 formed to be thinner than thickness of the abrasive grain layer 2 in at least one of outer peripheral pieces 1c partitioned by the slits 3 adjacent to each other in the peripheral direction of the substrate 1, and having at least higher wear resistance than that in the substrate 1, is provided between the abrasive grain layer 2 and the substrate 1.