The subject innovation is raw relates to water purifiers the filling box is provided, and more specifically with a plurality of water purification filter 12 to purify the incoming water from the outside, the filtered water and went by the water filter 12 is constant supply pipe and 14, the water storage tank 16 is passed Save, the water tank the hot water tank 20 and the cold water tank 18 for supplying hot and cold water to heat and cool the feed at 16 the casing (10 ) according to the the water purifier be installed therein; A plurality of coupling the side predetermined position of the casing 10, the main body groove 32 'is formed and, wherein the coupling groove (32' with a plurality of engaging projections 32 are formed so geolrilsu sandwiched doedoe corresponding to) the enemy can damgyeojil a is a provided with the raw water supply tube 30 having a predetermined shape, so that the engaging projection 32 of the engagement groove to be supplied to cylinder 30 the casing 10, the raw water by interposed (32 ') of the casing (10) Due to the feature that the coupling, Because by to supply raw water from the water supply through water facilities without mountainous areas in as well as possible the use of water purifiers to enable the use of the water purifier at any place and be able to use the portable water purifiers for travel water supply through It relates to a water purifier provided.