To provide an air purifier with a strong sterilizing function.

The air purifier includes a space where two liquids, i.e., a first sterilizing liquid containing at least one or two or more kinds of iron (III) ions (Fe3+), sorbic acid and benzoic acid, in addition to L-ascorbic acid, and one to three kinds of second sterilizing liquids selected from among hypochlorite sodium solution, electrolyzed water, ethanol and ozone water, are ejected from a nozzle means 2 in the form of mist, shower or membranous washing liquid simultaneously or at different times. This space also serves as a sterilization space 3 where the air to be purified is passed for sterilization treatment.