The invention discloses a wasp trapper which comprises a trapping box, a collecting box and a high-voltage shocking device. The wasps are trapped into the trapping box through rotten bodies and are then collected into the collecting box by aid of the phototaxis of the wasps. The wasp trapper is simple in structure and high in efficiency. Another purpose of the wasp trapper is that after wasps enter the collecting box by pushing a vertically swinging transparent door page, the page is closed automatically to prevent the wasps from flying out. Another purpose of the wasp trapper is to trapper wasps one by one by using rotten bodies as baits so as to prevent hurting bees by mistake. Another purpose of the wasp trapper is to electrically shock only the wasps by the high-voltage shocking device, so the efficiency is improved.