Flush toilet

A flush toilet, comprising:

• a bowl part that includes a waste-receiving surface with a bowl shape and a rim part that is formed on an upper side of the waste-receiving surface;
• a water spout part that is provided on the rim part and spouts washing water toward an inside of the bowl part;
• a drainage water trap part that is connected to a bottom part of the bowl part and discharges waste in the bowl part;
• and
• a water drainage socket that is provided with an upstream side that is connected to the drainage water trap part and a downstream side that is connected to a water drainage port of a floor surface where the water drainage socket includes a back side R part that changes a flow channel in such a manner that washing water that flows from an upper side is directed to a front side, a front side R part that is provided on a downstream side of the back side R part and changes a flow channel in such a manner that washing water that flows from a back side is directed to a lower side, and a water storage part that stores a part of washing water on a flow channel from the back side R part to the front side R part, wherein
• the water drainage socket includes a throttle part that is provided on a downstream side of the front side R part and decreases a cross-sectional area of a flow channel of the front side R part, wherein
• a center of a flow channel of the throttle part in a radial direction thereof is located on a front side of a center of a flow channel of a site where the throttle part is provided in the front side R part in a radial direction thereof.