AUXILIARY TOILET SEAT FOR INFANT

PURPOSE:To apply an auxiliary toilet seat to a heat-insulation type toilet seat, a toilet seat having a washing function, etc., stably by forming a placement part formed in a circumferential edge part of a seat surface in such a way that a forward end edge and both side edge parts are almost horizontal, and that an upward facing cut part is formed at a back edge part to be suitable for a deformed seat. CONSTITUTION:A vertically long through-hole 3 is formed in an oval form at a center of a seat surface 2, and a circumferential edge part of the seat surface 2 is curved down for only a small height to form a placement part 21 to a toilet seat. In the placement part 21, a front edge part and both side edge parts of the seat surface 2 are formed to be almost horizontal, and a back end edge is formed as an up-curved cut part 22. A cut form of the cut part 22 is applied to a back part form of the toilet seat provided with a heating function, a washing function, etc. As a result, this seat can be used without troubles even on the toilet seat having a back end part of an inclined surface as well as on the toilet seat of a conventional structure having a flat seat surface.