An air filtering apparatus for subjecting air to sterile filtration to remove microorganisms such as virus, bacteria, etc. from the air and introducing the filtered air to a room including a gas-liquid contact tower (C) having a main body (100) in which electrolytic water and indoor air are supplied to be brought into contact with each other, whereby the indoor air is subjected to sterile filtration with the electrolytic water, the indoor air being introduced from the gas-liquid contact tower into the room.
