To provide a bubble producing apparatus for a toilet stool capable of surely discharging bubbles to a desired part of the inside of the toilet stool.

In a bidet 1 provided with a tank 2 storing a bubble producing liquid 16, a bubble producing means producing bubbles in the bubble producing liquid 16 in the tank 2, a bubble outflow opening 70 flowing out produced bubbles 22 to the outside of the tank 2, a bubble supply opening 14 supplying the bubbles 22 to the inside of the toilet stool 51, and a bubble flowing out passage part 73 communicating with the bubble outflow opening 70 and the bubble supply opening 14, the bubble supply opening 14 is arranged lower than an upper face 51a of the toilet stool and an opening direction is directed downward.