Abstract: Provided is a toilet bowl comprising an upper forming body having an upper surface part that forms an upper surface of the toilet bowl in an installed state; and a lower forming body having an inner wall part joined to an inner edge part of the upper surface part, and an outer wall part joined to an outer edge part of the upper surface part. A space part is formed between the inner wall part and the outer wall part. A dimension in an up-down direction from a lower end of the space part to an upper surface of the inner wall part is larger than a dimension in the up-down direction from an upper end of the space part to the upper surface of the inner wall part.