A rotary cutter for a mower has a cord for cutting grass and the like by rotating itself a reel for housing the cord and feeding the cord while intermittently rotating a case for housing the reel a cover for covering the case and a pressing body protruding from the case. The pressing body is axially movable by being pressed, and intermittently rotating the reel. The reel and the pressing body are integrally constructed. Concave grooves for inserting the cord are provided in the reel in a radial direction and the cord is wound by fitting it to the concave grooves.
