This is a retrospective study of 161 ovarian neoplasms, all of which were surgically removed and had preoperative sonographic examinations. They were evaluated respect to age, tumor size and its echogenicity. The results were as follows : 1. Of all 161 tumors, physiologic lesions were 67 cases(41.6%) , germ cell tumors were 28 cases(17.45) and serous tumors were 19 cases (11.8%). 2. Of all 161 tomors , right ovarian lesions were 82 cases(50.9%), left were 59 cases (36.7%), and bilateral lesions were 20 cases(12.4%). 3. The most characteristics findings of tumors were as follows. 1) Physiiologic tumors were 2-9cm sized (88.1%) anechoice-5% echogenic (79.1%), and developed during 4 th & 5 th decades(91.0%). 2) Inflammatory tumors were 2-9cm sized (94.1%) 50% totally echogenic (76.5%) and during 4th & 5th decades (94.1%). 3) Serous tumors were 2-9cm sized (60.3%) anechoic-5%echogenic (89.5%) and during 3 rd & 4th decades (84.2%) 4) Nucinous tumors were 5-19cm sized(77.8%), anech ic5% echogenic (77.8%) and during 2 nd -8th decades with diffuse distribution 5) Endometrioid tumors were 5-14cm sized(100.0%) variable echogenic, and during 3rd &4th decades(90.9%). 6) Germ cell tumors were 5-14 cm sized (75.0%) variable echogenic, during 3rd & 4 th decades(82.1%). 7) Parovarian cysts were 2-14 cm sized(90.0%), anechoic-5% echogenic (100.0%), with diffuse age distribution. 4. The malignant adn bofderline malignant tumors were 9 cases with more than 10 cm sized(77.8%) and developed during older than 4th decade(100%).Anechoic 3 cases, 1-5% echogenic 2 cases, and totally echogenic 4 cases were found.