as recessed socket type machine screws which are not easily removable without special tools in the event that temporary or removable mounting is desired bolts 27 may constitute large wing or knurled headed bolts so that the seat assembly may be conveniently detached by hand from bracket assembly 10 and removed from the toilet permitting conventional use of the hinged toilet seat 17 attachment bracket 30 as well as the mounting bracket assembly 10 preferably are made of stainless steel or some other non corrosive material resistive of the operating atmosphere in which the present invention is utilized as noted heretofore seat sectors 32 32 are secured to the planar platform portion 38 of the attachment bracket 30 the seat sectors if that style of toilet seat is employed as opposed to closed or a horseshoe shaped seat for example preferably are of padded construction for comfort to the user in order to maintain the seat sectors in a desired elevated position above the rim of the toilet bowl forward support of the sectors 32 is required for that purpose a rigid support bracket 33 is employed to cooperate with support leg 36 of bracket 30 as shown in fig1 and 2 of the drawings the support bracket 33 constitutes a stainless steel or if desired plastic or other rigid inert material member of semi arcuate form and sufficient lateral width to bridge between and beneath the seat sectors 32 32 to which it is attached as by attachment bolts or screws extending through tab portions 40 formed at the upper ends.