an electrolytic bath for manufacturing acid water capable of securing sufficient conductivity even in pure water or deionized water without separately using a catalyst or an ion exchange resin , electrolyzing the pure water or deionized water as well as tap water , and particularly minimizing a reaction between ions and a gas through a deaeration effect and an electrolytic effect in one electrolytic process , increasing conductivity of acid water , and enhancing reduction potential and maintenance time of dissolving power , to obtain acid water as stable acid reduced water .