PURPOSE: To provide an alkaline ion water-adjusting device wherein a stable set pH value can easily be obtd. in accordance with change in water quality of city water, and an ion water with a higher pH value or a lower pH value than an ion water with an ordinary set pH value set at the beginning can easily be obtd. in accordance with a requirement.

CONSTITUTION: An electrolytic tank having an inlet opening 2, an outlet opening 3, a water drainage opening 4, an electrolytic room A6 and an electrolytic room B8 is installed in a water adjusting device main body 1 and a water feeding joint 13 and an outlet pipe 14 are connected with the outlet opening 3 and a water drainage joint 15 and a water drainage hose 16 are connected with the water drainage opening 4. A water saving top 19 with a penetrated hole with a smaller diameter than the inner diameter of the water feeding joint 13 and the outlet pipe 14 is pushed in and attached to the inner diameter part of the end face of the water feeding joint 13 side of the outlet pipe 14 and the outlet pipe 14 is fitted in the water feeding joint 13.