Abstract: The combination of a water-closet and a bidet useful both when there is little space available and for invalids. The combination comprises a main body having a first cavity and a second cavity, each having an upper access adjacent to that of other. The first cavity has a liquid outlet hole connected to an evacuation line through a siphon and a plurality of perimetral liquid inlet holes. The second cavity has a central liquid inlet hole and a liquid outlet hole offset from said central hole and connected to said evacuation line. The main body comprises a liquid reservoir and a mechanism for retaining and releasing liquid from the reservoir. The combination overcomes drawbacks in the layout of sanitary fixtures in small spaces.