Abstract: A bidet of small size, that can be mounted on a toilet bowl of any conventional structure without preliminary adjustment. This bidet whose function is to spray one or two water streams of adjustable temperature toward the anus or the genital parts of the toilet's user when seated onto the toilet bowl, then to dry the so sprayed parts of the body by means of a reversible fan blowing air at an adjustable temperature, and to drive out of the room the polluted air and vapor structurally comprises a thin oval-shaped element that can be fixed to the toilet bowl between the upper periphery of the bowl and the toilet seat, and a casing of very small dimension that is rigidly fixed by its upper wall to the rear of the thin element and that extends in a direction parallel to the longitudinal axis of the toilet bowl without overheighting the plane in which extends the toilet seat.