PROBLEM TO BE SOLVED: To provide a functional water generator capable of preventing contamination of an adsorption component such as a hardness ion component into mist or steam diffused into the air by a diffusion part.SOLUTION: A water storage tank 20 has: a first water storage part 20a into which water is supplied from the outside, and which is provided with an exhaust port 25 and a second water storage part 20b which is partitioned via a partition wall 21 with respect to the first water storage part 20a, and into which water is supplied by overflow from the first water storage part 20a. Electrodes 23a, 23b are arranged in the first water storage part 20a, and a diffusion part 22 is arranged in the second water storage part 20b.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】放散部が空気中に放散するミスト又はスチームに硬度イオン成分等の吸着成分が混入するのを防止することができる機能水生成装置を提供する。【解決手段】貯水槽20は外部から給水されるとともに排水口25が設けられる第1貯水部20aと、第1貯水部20aに対して仕切壁21を介して仕切られるとともに第1貯水部20aの溢水により給水される第2貯水部20bとを有し、第1貯水部20aに電極23a、23bを配して第2貯水部20bに放散部22を配した。【選択図】図1