| 摘要 |
PROBLEM TO BE SOLVED: To provide a flush toilet bowl for reducing noise at residual sewage draining action time after generating the siphon action without reducing siphon action generating capacity. SOLUTION: This flush toilet bowl has a trap part for connecting a rising passage part having a bowl part for receiving a waste material, and having a rising passage communicating with a drain port formed in a bottom part of the bowl part, and a downstream passage part having a descending pipe bending downward to the downstream side from a top part of the rising passage for introducing wash water passing through the rising passage part to an external drain passage, and has a jet part having a jet part having a jet hole for injecting the wash water toward the downstream side of the rising passage part. A return water checking means is arranged in the trap part for checking a flow of the wash water processing to the drain port after colliding with the trap part among the wash water injected from the jet hole.
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