A bidet for being attached to a toilet bowl comprising—a flexible skeleton that fits to the bowl rim and is stabilized by a metal hook, inserted inside the toilet's water's run off holes and a second wire attached to a seat screw on the underside of toilet, —an elastic tube, with a curve, which brings the water from a valve of quick or slow action to a hard tube's flush nozzle, which produces the water jet, wherein the hard tube, when in a no use position, lies, almost hidden, under the bowl's rim, and for being used is rotated on a shaft of the skeleton, so the flush nozzle comes out to about the center of toilet, pulled manually by a thread which acts on the curved elastic tube wherein after use the bidet moves automatically in the no use position, thanks to the elastic tube suitably arranged, which serves at the same time for water conduct.