Abstract: A toilet unit has a toilet room with at least one corner, and a toilet arranged in the corner and including an upper water tank for supplying water, a lavatory basin-bidet, a seat associated with the basin-bidet, a spraying device associated with the seat of the basin-bidet for spraying in the latter, a device for heating water supplied for spaying and air supplied for drying, controlling elements conveniently located at a level of the seat. Elements of the tank including a float, a frame on which a valve member of a water supplying valve is arranged, and a pulley of a cable for a water discharging valve are turnable about a single axis which extends perpendicularly to a diagonal plane of symmetry of the water tank.