The ultrasonography is a very useful diagnostic procedure in obstetric & gynecologic mass. so we anlayzedtotal 153 cases of pelvic ultrasonogram with pathologic diagnoses. The results were as follows: 1. The ages ofpatients were distributed from 16 to 70 years-old, and the third decade was the most prevalent. 2. Of 153 cases,the ovarian masses were 85 cases, the tubal ones were 49 cases, and the uterine were 19 cases. 3. Of 85 ovarianmasses, physiologic ovarian cysts were 44 cases, and cystic teratoma were 14 cases. Of 49 tubal masses, tubalpregnancies were 35 cases and the most prevalent. Of 19 uterine masses, leiomyomas were 11 ases and the mostprevalent. 4. Of 153 cases, the echo-complex masses were 103 cases, the cystic ones were 34 cases, and the solidones were 19 cases. 5. The characteristic findings of frequent masses were as follows: (1) The physiologic ovariancysts were 44 cases, and show mainly cytic or pure cystic masses in 42 cases. (2) The ectopic pregnancy were 36cases, and show echo-complex masses in 21 cases, and cul-de-sac fluid echo in 22 cases. (3) The cystic teratomaswere 1 cases, and reveal mainly cystic or pure cystic masses in 10 cases, and calcification with posterioracoustic shadowing in 6 cases. (4) The uterine leiomyoma were 11 cases, and reveal solid mass with abnormaluterine contour in 8 cases. (5) The malignant or borderline malignant lesions were 6 cases. (6) Of 153 cases, thepathologic diagnosis was possible in 98 cases(64.1%).