Flush toilet

A flush toilet which is a siphon jet flush toilet, comprising:

• a bowl that includes a waste receiving surface configured to receive waste, and a rim formed above the waste receiving surface;
• a discharge trap conduit that includes an ascending conduit provided in a lower portion of the bowl and extending upward, a descending conduit extending downward from the ascending conduit, and a top portion located between the descending conduit and the ascending conduit;
• a jet spout port provided in the lower portion of the bowl and configured to spout flush water toward an inlet of the discharge trap conduit;
• and
• a jet water conduit configured to guide flush water to the jet spout port, wherein
• in a flow channel cross-section of the ascending conduit of the discharge trap conduit, a narrowed portion that narrows a flow channel in which the flush water flows is provided in an upper-side flow channel located above a center line of the discharge trap conduit in an up-down direction, and a flow channel cross-sectional area of the upper-side flow channel is smaller than a flow channel cross-sectional area of a lower-side flow channel located below the center line.