Cutter

The utility model relates to a cutter which comprises a cutter handle, a cutting tool and a guide piece, wherein the cutting tool is installed on the cutter handle; a cutting edge is formed on the cutting tool; the guide piece comprises a guide surface, the guide piece is fixedly installed on the cutting tool, and the guide surface and the cutting tool form a guide part which is connected with the cutting edge, so that cutting chips which are cut off by the cutting edge are blocked by the guide surface to change the direction and discharge from the guide part. The cutter has the advantages that a workpiece can be prevented from being scratched, and the service life can be prolonged.