[Problems] It is intended that it can be swept away quickly clean excrement. A the seat body 10 having a substantially horizontal dish-shaped defecation receiving portion 14 and the substantially vertical groove-like urination receiving portion 15, a bottom gap portion 29 on the lower surface of the seat body 10 and the rear behind a cover portion 11 after fitted in a gap portion 30, and a hip receiving portion 13 provided on the front end of the seat body 10, which is located at the back gap portion 30 of the rear cover section 11 and blower tube connecting member 49 a water pipe connecting member 50 and the connector 51 is provided, said the blast pipe connecting member 49 and the air feed pipe 56 to the air passage 46 communicating, the water pipe connecting member 50 and the washing water nozzle 17 and washing water a water conduit 45 that the nozzle 18 communicating, it is one that was arranged through the bottom gap portion 29 and an electrical cord 55 from the back gap portion 30. .BACKGROUND【課題】排泄物を速やかにきれいに押し流すことができるものであること。【解決手段】略水平皿状の排便受け部14と略垂直溝状の排尿受け部15を有する便座本体部10と、この便座本体部10の下面に底面空隙部29を有し、背後に背面空隙部30を有して嵌合される後カバー部11と、前記便座本体部10の前端部に設けられる尻受け部13とを有し、後カバー部11の背面空隙部30に位置して送風管連結部材49と送水管連結部材50とコネクタ51を設け、前記送風管連結部材49と送風路46を連通する空気送り管56と、前記送水管連結部材50と洗浄水ノズル17及び洗浄水ノズル18を連通する導水管45と、電気コード55とを前記背面空隙部30から底面空隙部29を経て配置したものである。【選択図】図1