PROBLEM TO BE SOLVED: To provide an anion generator, in which noise is reduced and the generating amount of ion, the cleaning capacity of air and deodorizing ability are maintained. SOLUTION: The anion generator is provided in an injection unit 2 with a plurality of stages of nozzles 106 for injecting water and a nozzle for generating ions is employed for the upper stage nozzles 5 while a nozzle, whose purpose is the cleaning of air or deodorizing, is employed for the lower stage nozzles 6.