Ovarian pregnancy is an uncommon type of ectopic pregnancy. A 35-year-old, gravida 3, para 3 woman was admitted because of a vaginal bleeding of 17 days' duration after amenorrhea for 10 weeks. She had right lower quadrant pain. Serum beta-human chorionic gonadotropin concentration was 1530 mIU/ml. Transabdominal ultrasonography showed a normal-size uterus, empty uterine cavity, solid cystic mass 43 x 39 mm on the right adnexa, and no free fluid in the pouch of Douglas. Diagnostic operative laparoscopy under general anesthesia was performed for suspected ectopic pregnancy. Right oophorectomy was done because of minimal intact ovary tissue. It was later histopathologically confirmed as primary ovarian pregnancy. The woman experienced no postoperative complications.