A water dispenser capable of providing hot, cold, and ionized water is provided to fundamentally prevent lowering of water pressure provided to an electrolytic cell through a raw water supply pipe. A water dispenser capable of providing hot, cold, and ionized water comprises a raw water supply pipe(11), a filter unit(20), cooling and heating units, and an ionized water supply unit(70). The filter unit is connected with the raw water supply unit. The cooling and heating units are connected with the filter unit for cooling and heating the supplied water. The ionized water supply unit is directly connected with the raw water supply unit, wherein the ionized water supply unit comprises an electrolytic cell(75) having three cells(72,73,74) and three electrodes(76,77,78), and produces ionized water by water electrolysis.
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