PURPOSE: A sitz bath apparatus is provided to easily perform a sitz bath from simple installation, thereby enabling to improve health. CONSTITUTION: A sitz bath apparatus includes a sitz bathtub, a water supply hose, a water supply pump, a connection pipe, an oxygen generator, and etc. I The sitz bathtub(110) is inserted and mounted in a toilet seat(1). A drainage stopper(112) is installed inside of the sitz bathtub. One end part of the water supply hose(120) is installed in the sitz bathtub and the other end is connected to a water supply source. The water supply pump(140) is connected to the water supply hose and supplies water to the sitz bathtub through the water supply hose. A check valve(131) is installed in the connection pipe(130). The check valve prevents backward flowing of the water supplied to the water supply hose side by the water supply pump. The oxygen generator(150) is installed in the water supply hose and generates air bubbles in the water supplied to the sitz bathtub.본 발명은 좌욕기에 관한 것으로서, 좌변기 또는 비데기의 변좌에 삽입되어 착탈가능하게 설치되는 좌욕조; 상기 좌욕조에 그 일단부가 설치되고 타단부는 급수원에 연결되는 급수호스; 상기 급수호스에 설치되어 급수호스를 통해 좌욕조로 물을 공급하는 급수펌프; 및 상기 급수호스에 설치되어 좌욕조에 공급되는 물에 에어버블을 발생시키는 산소발생기;를 포함한 것을 특징으로 하여, 용변 후 좌욕기를 간단하게 설치하여 좌욕을 할 수 있게 되므로 건강을 증진시킬 수 있게 된다.