A flush toilet in which flush water cleanses the toilet and expels waste, comprising: a bowl portion having a bowl-shaped waste-receiving surface and a rim portion, the inside wall surface on the top edge of which protrudes inward; a trap pipe (4, 104) connected to and extending from the bottom of the bowl portion to expel waste, and defining the initial accumulated water level of the bowl portion; a first shelf portion formed on the top edge of the waste-receiving surface following the rim portion; a first orifice for issuing flush water onto the first shelf portion, forming a swirl flow on the waste-receiving surface; and a first flow path for supplying flush water to the first orifice; wherein the flush toilet further comprises: a second shelf portion formed on the waste-receiving surface below the first shelf portion and above the initial accumulated water level, wherein the second shelf portion extends from the rear of the bowl portion to the side surface of the bowl portion, and wherein a front edge of the second shelf portion is positioned on the side portion of the bowl portion; a protruding portion formed above the second shelf portion so as to at least partially cover the second shelf portion, wherein a slit-shaped gap is formed between the protruding portion and an inner perimeter portion of the second shelf portion, a second orifice for issuing flush water onto the second shelf portion, wherein the second shelf portion is configured such that flush water flowing down from the second shelf portion stirs accumulated water in the bowl portion as it forms an up and down flow; and a second flow path for supplying flush water to the second orifice. a bowl portion having a bowl-shaped waste-receiving surface and a rim portion, the inside wall surface on the top edge of which protrudes inward; a trap pipe (4, 104) connected to and extending from the bottom of the bowl portion to expel waste, and defining the initial accumulated water level of the bowl portion; a first shelf portion formed on the top edge of the waste-receiving surface following the rim portion; a first orifice for issuing flush water onto the first shelf portion, forming a swirl flow on the waste-receiving surface; and a first flow path for supplying flush water to the first orifice; wherein the flush toilet further comprises: a second shelf portion formed on the waste-receiving surface below the first shelf portion and above the initial accumulated water level, wherein the second shelf portion extends from the rear of the bowl portion to the side surface of the bowl portion, and wherein a front edge of the second shelf portion is positioned on the side portion of the bowl portion; a protruding portion formed above the second shelf portion so as to at least partially cover the second shelf portion, wherein a slit-shaped gap is formed between the protruding portion and an inner perimeter portion of the second shelf portion, a second orifice for issuing flush water onto the second shelf portion, wherein the second shelf portion is configured such that flush water flowing down from the second shelf portion stirs accumulated water in the bowl portion as it forms an up and down flow; and a second flow path for supplying flush water to the second orifice. a second shelf portion formed on the waste-receiving surface below the first shelf portion and above the initial accumulated water level, wherein the second shelf portion extends from the rear of the bowl portion to the side surface of the bowl portion, and wherein a front edge of the second shelf portion is positioned on the side portion of the bowl portion; a protruding portion formed above the second shelf portion so as to at least partially cover the second shelf portion, wherein a slit-shaped gap is formed between the protruding portion and an inner perimeter portion of the second shelf portion, a second orifice for issuing flush water onto the second shelf portion, wherein the second shelf portion is configured such that flush water flowing down from the second shelf portion stirs accumulated water in the bowl portion as it forms an up and down flow; and a second flow path for supplying flush water to the second orifice.