To provide a water recovery device for a fuel cell power generator capable of reducing an auxiliary machine loss in the fuel cell power generator for improving system efficiency.

In this water recovery device 30 for the fuel cell power generator, vapor water in emission gas discharged from a fuel cell 20 is liquefied by condensing means 31a and 33, and the liquid water is fed to the fuel cell 20. The water recovery device 30 is provided with a water tank 34 for collecting the liquid water W in the downstream part of the condensing means 31a and 33, and using a water pressure of the water tank 32, the liquid water W is supplied to the fuel cell 20.