The handy glass cutter that pertains to the technical field of designing and manufacturing glass cutters comprising a square-tube footage rod and a cutting head. The footage rod has a slide block and metric scales equipped with an oil-storing cavity on one end of the footage rod. The oil-storing cavity is provided with a cutting head. The handy glass cutter is simple to use by shifting the slide block to the cutting length position required, propping the screw on the slide block against the side surface of the glass and carrying out cutting by shifting the both hands simultaneously. The cutter will not go off tracking when the cutting is going on because the square-tube footage rod never bends. The quality of cutting is therefore improved. The cutter is especially convenient for use and does its work quickly. The utility model overcomes the problems existing in the use of the prior art when the measuring ruler, a folding ruler or a tapeline, is prone to bend and the operating cutter is prone to go off tracking. It is an ideal cutter for cutting glass.