The present disclosure relates to a humidifier. A humidifier according to one aspect of the present disclosure includes: a case; and a humidification assembly disposed inside the case, that produces mist, wherein the humidification assembly includes: a humidification chamber with a space for holding water; a sterilizer that irradiates the inside of the humidification chamber with light; and a reflector disposed along a peripheral wall of the humidification chamber. Thus, the hygiene of the humidification assembly can be maintained easily.