A flush toilet for discharging waste by using flush water supplied from a flush water source , comprising: a bowl portion , having a front, a rear, a left and a right side as viewed from the front of the bowl portion, including a bowl-shaped waste receiving surface , a rim portion formed at a top portion of the waste receiving surface , a shelf portion formed between the rim portion and the waste receiving surface , and a concave portion formed at a bottom of the waste receiving surface ; a discharge passage for discharging waste, an inlet of the discharge passage being connected to a bottom of the bowl portion ; a first spout port portion for spouting flush water toward the front of the bowl portion onto the shelf portion of the bowl portion to form a circulating flow; a second spout port portion ; a first water conduit connected to the flush water source for supplying flush water to the first spout port portion ; and a second water conduit , connected to the flush water source , for supplying flush water to the second spout port portion ; said first water conduit and said second water conduit being formed so that flow rate of flush water spouted from said second spout port portion is greater than flow rate of flush water spouted from said first spout port portion , said first spout port portion being formed to the rear of a center portion of the left side of the bowl portion, characterized in that said second spout port portion is formed at the rear of the right side of the bowl portion , in that said second spout port portion is configured for spouting flush water on the shelf portion toward the rear of the bowl portion in a same direction as a circulating direction of flush water spouted from said first spout port portion and in that said second spout port portion has an opening having an area larger than an area of an opening of said first spout port portion . a bowl portion , having a front, a rear, a left and a right side as viewed from the front of the bowl portion, including a bowl-shaped waste receiving surface , a rim portion formed at a top portion of the waste receiving surface , a shelf portion formed between the rim portion and the waste receiving surface , and a concave portion formed at a bottom of the waste receiving surface ; a discharge passage for discharging waste, an inlet of the discharge passage being connected to a bottom of the bowl portion ; a first spout port portion for spouting flush water toward the front of the bowl portion onto the shelf portion of the bowl portion to form a circulating flow; a second spout port portion ; a first water conduit connected to the flush water source for supplying flush water to the first spout port portion ; and a second water conduit , connected to the flush water source , for supplying flush water to the second spout port portion ; said first water conduit and said second water conduit being formed so that flow rate of flush water spouted from said second spout port portion is greater than flow rate of flush water spouted from said first spout port portion , said first spout port portion being formed to the rear of a center portion of the left side of the bowl portion, characterized in that said second spout port portion is formed at the rear of the right side of the bowl portion , in that said second spout port portion is configured for spouting flush water on the shelf portion toward the rear of the bowl portion in a same direction as a circulating direction of flush water spouted from said first spout port portion and in that said second spout port portion has an opening having an area larger than an area of an opening of said first spout port portion . <EOS>