WATER PURIFIER

The present invention relates to a water treatment device, and more specifically to a water purifier capable of removing scale in a simple manner. A water purifier according to one aspect of the present invention includes: a body casing; a raw water flow path unit provided in the body casing and through which introduced raw water flows; a filtration unit for filtering the raw water to generate purified water; a purified water flow path unit through which the purified water flows; a purified water outlet flow path unit through which the purified water flows to be discharged to the outside; a water outlet unit detachably coupled to the body casing, connected to the purified water outlet flow path unit, and provided with a drinking water outlet to allow the purified water to be discharged to the outside; a descaling kit unit detachably coupled to the body casing so as to be replaceable with the water outlet unit and provided with an internal flow path to allow washing water to flow to the purified water flow path unit, wherein the washing water is generated by dissolving a descaling material in the purified water introduced through the purified water outlet flow path unit; and a control unit for controlling fluid flow in each of the units.