The invention provides a water kettle, which comprises a cleaning device arranged inside the water kettle, wherein the cleaning device comprises a connecting part and a descaling device; the connecting part comprises an annular connecting piece and a movable piece arranged in the annular interior of the annular connecting piece; the annular outer wall of the annular connecting piece is detachably connected to a water inlet, and an accommodating groove is formed in the annular inner wall of the annular connecting piece; the movable piece is rotatably arranged inside the accommodating groove; a plurality of grooves are formed in the circumference of the movable piece at equal spacing; the descaling device is attached to the inner wall of the inner cavity of the water kettle; the descaling device comprises a plurality of first descaling scrapers and at least one second descaling scraper; each of the first descaling scrapers is vertically attached on the sidewall of the inner cavity of the water kettle; and the second descaling scraper is attached on the bottom wall of the inner cavity of the water kettle. The water kettle disclosed by the invention is simple in structure; and by driving the descaling device to rotate in a mode of attaching to the inner wall of the water kettle by rotating the movable piece, water scale on the inner wall of the water kettle is removed.