The radiological measurement of the pituitary fossa provides an important clinical value in evaluation of the borderline cases of the intracranial disease, particularly in sellar and parasellar tumors. Normal volume of the pituitary fossa is measured from antero-posterior and lateral projections of the skulls with focus-film distance of 30 inches. Following formula was used for calculation of the volume of the pituitary fossa. V=0.36$ imes$L$ imes$H$ imes$W L: length of the pituitary fossa H: height of the pituitary fossa W: width of the pituitary fossa In 200 Korean adults, 103 males and 97 females, the mean volume of the pituitary fossa is 601m㎥ and the range of the volume of the pituitary fossa is 310m㎥ to 1236m㎥. The mean volume of the pituitary fossa is larger in females (mean: 582m㎥) than in males (mean: 622m㎥).