Ultrasonographic and radiographic findings in 72 cases of pelvic masses which have been proved histopathologically were analyzed. The results were as follows; 1. Among 72 cases, 28 cases were uterine masses and 44 cases were adnexal masses. 2. pathologic accuracies of ultrasonographic diagnosis were 64.3% in uterine masses, 70.5% in adnexal masses, and 68.1% in all pelvic masses. 3. Plain or IVP findings were not specific in diagnosis and showed secondary mass effects or functional disturbances. 4. Because of its high accuracy of pathologic diagnosis and safety, ultrasonography can be regarded as the most valuable and preferential study. But in cases of cystic myomas, endometrioses, cystic missed abortions and huge masses, the accurate diagnoses were difficult.