The electrolysis water-making apparatus (A) which is an apparatus for making electrolysis water (W5) by electrolyzing a raw material solution (W1, W3) including a chlorine ion includes: an electrolytic cell (2); a raw material solution feed pump (3) used to supply the raw material solution (W1, W3) to the electrolytic cell (2); and a pipe (32, 36) connecting an outlet (3b) of the raw material solution feed pump (3) allowing the raw material solution (W1, W3) to be discharged therefrom and an inlet (26) allowing the raw material solution (W1, W3) to flow into the electrolytic cell (2). In addition, the raw material solution feed pump (3) is provided so that the outlet (3b) is disposed on a lower side of the inlet (26).