The present invention relates to a water purifier comprising a body having an external appearance of a shape able to hold water, and a discharge device which is located inside the body and discharges the water held in the body to the outside of the body; wherein the discharge device comprises a discharge unit body which has a hollow shape that provides a flow pathway for discharging the water held in the body, and a light-source unit which is disposed facing the discharge unit body and irradiates light having the wavelength band of ultraviolet light towards water flowing through the discharge unit body.