PURPOSE: To reduce consumption of washing water and further restrain the construction from becoming complex.

CONSTITUTION: Two water feed ports are formed on the upper surface of a toilet and one of the water feed ports 5 is connected to a rim water passage 1b provided along the periphery of an opening 1c of a bowl 1a and the other water feed port 6 is connected to a jet hole 3 formed near an inlet zone 4 of a discharge pipe 2. Therefore, since supply of washing water to the rim water passage and supply of washing water to the jet hole can be separately controlled, immediately after a siphon action has occurred, the supply of washing water to the jet hole is stopped, and hence the washing water is prevented from uselessly flowing out.