Flush toilet bowl

A toilet bowl has a first upper surface 110 located at a high position, and a second upper surface 112 located at a low position. A water conduction shelf 108 is formed on the inner wall surface of the toilet bowl so as to extend in the circumferential direction of the toilet bowl. A first water discharge opening 102 and a second water discharge opening 104 are formed in the inner wall surface ofthe bowl at positions above the water conduction shelf 108. The water conduction shelf 108 includes a first shelf section 114 formed at a position corresponding to the first upper surface 110, and a second shelf section 116 formed at a position corresponding to the second upper surface 112. The second shelf section 116 is formed at a lower position than the first shelf section 114. The second shelf section 116 and the first shelf section 114 are connected by a smooth shelf sloped surface 120a. In a section extending from the boundary point P1 between at least the second shelf section 116 and the shelf sloped surface 1