The ultrasonography is a very useful dignostic procedure in obstetric & ggynecoligic mass. So we analyzed total 153 cases of pelvic ultrasonogram with pathologic diagnoses. The results were as follows : 1. The ages of patients were distributed from 16 to 70 years-old , and the third decade was the most prevalent. 2. Of 85 ovarian masses. physiologic ovarian cysts were 44 cases, and cystic teratoma were 14 cases. Of 149 tubal masses, tubal pregnancies were 35 cases and the most prevlent. Of 19 uterine masses, leiomyomas were 11 cases and the most prevalent. 4. Of 153 cases, the echo-complex masses were 103 cases, the cystic ones were 34 cases, and the solid ones were 19 cases. 5. The characteristic findings of frequent masses were as follows : (1) The physiologic ovarian cysts were 44 cases, and show mainly cystic or pure cystic masses in 42 cases. (2) The ectopic pregnancy were 36 cases, and show echo-complex masses in 21 cases, and cul-de-sac fluid echo in 22 cases. (3) The c stic teratomas were 14 cases, and reveal mainly cystic or pure cystic masses in 10 cases, and calcification with posterior acoustic shadowing in 6 cases. (4) The uterine leiomyoma were 11 cases, and lreveal solid mass with abnormal uterine contour in 8 cases. (5) The malignant or bordeline malignant leision were 6 cases. (6) Of 13 cases , the pathologic diagnosis was possible in 98 cases(64.1%).