The air sterilization apparatus for generating and discharging hydroxyl radicals according to the present invention comprises an ozone chamber in which an ozone generator for generating ozone from inflow air is disposed A cartridge for supplying reactant gas reactive with ozone And an outlet face portion through which the ozone and the reactant gas are introduced, an outlet face portion through which the hydroxyl radical generated by the reaction of the ozone and the reactant gas is discharged, and a reaction region which is closed except for the inlet face portion and the outlet face portion. And a mixing chamber formed with an additional portion.
