Abstract: A bidet attachment for use with a conventional flush toilet comprises a bidet tube having a bent handle portion at one end, an arcuate spray arm portion and attached spray nozzle at the opposite end, and an intermediate straight portion, together with a bidet tube support assembly which attaches to the underside of the toilet seat and permits the spray arm to be pivoted independently about first and second perpendicular axes. A warm water supply unit for use in connection with said bidet attachment includes an elongated vertical water storage vessel having a bottom inflow connection and a top outflow connection, a heater for the water in the vessel, a cold water supply line to the inflow connection, a water control valve interposed in said cold water supply line, and a warm water supply line from the vessel outflow connection to the bidet attachment.