Water purifier

Provided is a water purifier. The water purifier includes a water purifier body including a housing defining an outer appearance and a filter provided in the housing to filter raw water introduced from the outside, a water discharge module including a water discharge nozzle that protrudes forward from the water purifier body to supply the water passing through the filter to the outside of the water purifier body, and a tray disposed below the water discharge nozzle. The water discharge module includes a case having a lower end through which the water discharge nozzle is exposed, an ultraviolet (UV) lamp disposed above the water discharge nozzle in the case to emit ultraviolet rays to an inner surface of the water discharge nozzle, a protection window made of a light transmission material and disposed below the UV lamp to protect the UV lamp against water, and at least one light source that irradiates light to the inside or outside of the water discharge nozzle according to turn-on/off of the UV lamp.