A water purifier according to an embodiment of the present invention includes: a main body; A storage tank mounted inside the main body and storing water; A cover unit including a frame body that is placed on an upper surface of the reservoir to cover the opened upper surface of the reservoir and has an opening formed therein, and a reservoir cover that is rotatably coupled to the frame body to selectively open and close the opening ; A sterilization device mounted on the reservoir cover; A switching module mounted on one side of the frame body and operating on and off so that power is selectively supplied to the sterilization device; And an operation member mounted on the reservoir cover, turning on the switching module when the reservoir cover is closed, and turning off the switching module when the reservoir cover is rotated and opened.
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