This electrolyzed water production device (1A) includes an electrolytic bath (3) that discharges electrolyzed products generated by electrolysis of a raw material solution from an outlet (2); a mixing section (4) that mixes the electrolyzed products with dilution water to generate electrolyzed water; and a mounting section (6) that has a connecting section (19) where a hole section (20) connected to the outlet (2) is formed and that allows the electrolytic bath (3) to be detachably mounted thereto. By moving either the electrolytic bath (3) or the connecting section (6) relative to the other, the communication between the outlet (2) and the hole section (20) is allowed or released. Additionally, the electrolytic bath (3) is mounted on the mounting section (6) in a state where the inside of the electrolytic bath (3) is filled with a predetermined amount of the raw material solution and sealed in advance and an additional raw material solution cannot be injected thereinto.