The invention relates to a cutter knife adapted to be mounted on a rotatably drivable knife shaft of a meat cutter machine. The blade of the knife is provided with at least one convexly configured margin with a cutting edge therei n and a plurality of openings disposed in predetermined relationship relative to t he cutting edge, the openings being in longitudinal section of substantially concav e configuration and reduce the mass and surface area of the blade from about 15% to about 30% and from about 20% to 50%, respectively, thereby reducing heat accumulation and retention in the blade.
