Diamond blade and method of producing same

A diamond blade having a cutting section consisting of diamond abrasive grains and attached to the outer peripheral edge of a substrate in order to decrease the wear of the under-head region of a cutting diamond blade, characterized in that at least either the front or the back of the substrate is provided with an island-shaped cutting section separated from the first-mentioned cutting section, an extended cutting section extending toward the center of the substrate or an approximately U-shaped profiled cutting section. Also a method of producing diamond blades, characterized by simultaneously performing the sintering of the cutting section and the binding of it with the substrate.