For evaluation of the pelvic pathology, many radiological examinations performed previously, are non-specific and non-satisfactory in determination of location and extent of the lesions. The development of gray scale ultrasound improved the accuracy of the pelvic examinations markedly, especially to differentiate the cystic and solid tumors, but it has considerable limitation because of overlaping bony pelvis. Anatomical feature of the pelvic cavity is advantagenous for computed tomographic study to determine location , extent and character of the lesions. Authors analized clinical, radiological, and operative findings of 50 patients of pelvic CT done in Kyung Hee University Hospital form October 1979. The results were as follows : 1) Sex distribution of patients were 26 males an 24 females. 2) It was our belief that CT was useful method to determine stage of bladder neoplasm. It was well corelated with CT and operative findings in cases of 12 bladder neoplasms. 3) Determinati n of location and extent bony or soft tissure lesions was easily done by CT. Thus, treatment planning of 16 bony or soft tissue lesions was of much help. 4) CT was available to differentiate between cystic and solid masses by evaluation of attenuation value of the lesions in cases of 5gynecoligic masses. 5) CT was a valuable method to decide function of transplanted kidney and its rejection phenomena.