A flush toilet includes a bowl part and a water storage part. The bowl part receives waste. The water storage part is formed on a bottom of the bowl part and stores a stored water. The water storage part includes a front surface part, a back surface part that is formed on a back side of the front surface part, and a pair of side surface parts that are formed between the front surface part and the back surface part. On at least one side surface part in the pair of side surface parts, a convex surface that protrudes toward another side surface part is formed.