Mosquito draws near human being or livestock by perceiving CO2 or body temperature generated from human being or livestock not only in the daytime but also in the darkness. Moreover, mosquito responds to a ultraviolet rays very sensitively. skone can lure mosquitoes by 3 materials which are heat, a certain wavelength of rays and carbon dioxide which is generated by photocatalyst lamp and CO2 which is generated by irradiating ultraviolet rays to the plate is coated by TiO2. Purifies air through photocatalysis & Sterilizes sundry bacteria Using TiO2, ATTENTION-GETTER of ENVIRONMENT PURIFICATION FIELD. A smoke/insecticide-free mosquito trap which simultaneously purifies air and exterminates mosquitoes has been specially devised. This device, using TiO2 (Titanium Dioxide) decoys mosquitoes with CO2 (Carbon dioxide) produces through photocalyst and with heat such as ultraviolet light. It can be used without fouling or polluting the place of installment, for it works by the method of exterminating mosquitoes through decoying them in to the trap. Moreover, it is absolutely harmless on environment, livestock and pets, for it is insecticide free.