The purpose of this study was 1) to analize the female figures with potbelly in the nude of the 15th-l6th century, 2) to find out the historic event which made these figures appeared, and 3) to clarify the influence these figures on dress. The results were as follows: 1) There was a sudden decrease in population by the Black Death in the Middle of the fourth century, so supplement of labor was urgent demand at that imp. Childbirth was the only way of supplement of manpower. 2) Therefore, the figure of pregnant woman was regarded as the female figure ideal. The artists depicted this figure ideal in nude. 3) This female figure ideal changed the form of dress. Pillow, pad, and special undergarments were used to make potbelly.