A flush toilet comprising: a toilet main body that has a toilet bowl portion and a water discharge portion for discharging washing water to the inside of the toilet bowl portion, wherein the toilet bowl portion has a receiving surface portion for receiving waste and a rim portion that is connected to an upper edge portion of the receiving surface portion, wherein the water discharge portion has three water discharge ports (32A-32C) formed in the rim portion and said water discharge ports being arranged to discharge washing water toward one side in a circumferential direction of the toilet bowl portion along an nner circumferential surface of the rim portion, wherein the toilet bowl portion has four divided regions (Sr1-Sr4) sectioned by a lateral center line (La) that bisects the lateral dimension of an outer surface portion of the toilet main body and by a longitudinal center line (Lb) that bisects the longitudinal dimension of an inner surface portion of the toilet bowl portion in a planar view, and wherein the three water discharge ports (32A-32C) are separately formed respectively in three divided regions (Sr1,Sr3,Sr4) out of the four divided regions (Sr1-Sr4), characterized in that the water discharge portion has a water passage portion which is a hollow structure portion arranged on the back side of the rim portion and serves to supply washing water to the water discharge ports (32A-32C), wherein the rim portion comprises three rim water leading passages (34A-34C) extending in the one side of the circumferential direction of the toilet bowl portion from the three water discharge ports (32A-32C), respectively, wherein the three water discharge ports (32A-32C) include a first water discharge port being arranged to discharge washing water in an amount that is larger than those from the other two water discharge ports (32B,32C), and wherein the other two discharge ports (32B,32C) are not formed in a divided region that is adjacent, on one side in the circumferential direction, to the divided region in which the first water discharge port is formed, out of the four divided regions (Sr1-Sr4). a toilet main body that has a toilet bowl portion and a water discharge portion for discharging washing water to the inside of the toilet bowl portion, wherein the toilet bowl portion has a receiving surface portion for receiving waste and a rim portion that is connected to an upper edge portion of the receiving surface portion, wherein the water discharge portion has three water discharge ports (32A-32C) formed in the rim portion and said water discharge ports being arranged to discharge washing water toward one side in a circumferential direction of the toilet bowl portion along an nner circumferential surface of the rim portion, wherein the toilet bowl portion has four divided regions (Sr1-Sr4) sectioned by a lateral center line (La) that bisects the lateral dimension of an outer surface portion of the toilet main body and by a longitudinal center line (Lb) that bisects the longitudinal dimension of an inner surface portion of the toilet bowl portion in a planar view, and wherein the three water discharge ports (32A-32C) are separately formed respectively in three divided regions (Sr1,Sr3,Sr4) out of the four divided regions (Sr1-Sr4), characterized in that the water discharge portion has a water passage portion which is a hollow structure portion arranged on the back side of the rim portion and serves to supply washing water to the water discharge ports (32A-32C), wherein the rim portion comprises three rim water leading passages (34A-34C) extending in the one side of the circumferential direction of the toilet bowl portion from the three water discharge ports (32A-32C), respectively, wherein the three water discharge ports (32A-32C) include a first water discharge port being arranged to discharge washing water in an amount that is larger than those from the other two water discharge ports (32B,32C), and wherein the other two discharge ports (32B,32C) are not formed in a divided region that is adjacent, on one side in the circumferential direction, to the divided region in which the first water discharge port is formed, out of the four divided regions (Sr1-Sr4).