To detect the breaking-off by an electrolyte in an electrolytic water generating device generating an electrolytic water by mixing the electrolyte stored in a tank in a raw water.

The electrolyte tank 8 is made of a resin, a reed switch 17 is arranged on the outside, a float 20 of a non-magnetic body incorporating a permanent magnet 19 is floated on the liquid surface of the electrolyte 21 in the electrolyte tank 8 and when the liquid level is lowered to equal to or below a fixed level, the reed switch 17 is closed by the magnetic flux of the permanent magnet 19.