To prevent a flow detecting means to be operated by the closure of a faucet from being affected by a deposit such as calcium in the mechanism for closing an electrically-driven valve on the waste water side of an end stop- system electrolytic water generator.

Two water feed branch pipes from a water feed main pipe 1a are independently communicated with the coupled electrode compartments of a diaphragm-provided electrolytic cell 2. A flow detecting means to be operated by the closure of the faucet 5 of the water discharge pipe 3 of the cell 2 on the delivery side is furnished to the branch pipes and/or main pipe 1a, and an electrically-driven valve 6 of the water discharge pipe 4 on the waste water side of the cell 2 is closed based on the detection signal of the flow detecting means 13a.