The utility model relates to a hand saw, which is provided with a plurality of sawteeth, and a handle connected with a saw plate, wherein two side cutting edges of the sawteeth form an inclined shape, so that the sawteeth is sharp and has less resistance as well as increases the space of chip removal. The cutting edges of two adjacent sawteeth of the hand saw are arranged inversely, one side of each sawteeth reverse to the cutting edge forms valgus so as to save labor during sawing. Two side cutting edges of the sawteeth form the inclined shape, the cutting edge at the lower end of the sawteeth can form a small triangular inclined plane, thereby ensuring the sharpness of the tip of the sawteeth as well as reducing the resistance of the sawed object during sawing. During sawing, the wear of the cutting edges on three planes is synchronous so as to maintain the sharpness of the sawteeth.