Background: Ectopic pregnancy is one of the ginecobstetric conditions that contribute to increased maternal mortality by 10 to 15% of cases. Ovarian ectopic pregnancy is one of the rare cases and represents up to 3% of ectopic pregnancies. Case: Female with 33 years old with lower abdominal pain, and pallor. Transvaginal ultrasound showed a live product with 15.3 weeks in left ovary and moderate hemoperitoneum. Exploratory laparotomy was performed with left salpingo-oophorectomy; postoperative course was satisfactory, discharged on the fourth day. Conclusion: Ovarian pregnancy is a rare form of presentation. Preoperative diagnosis is difficult and must have a high level of diagnostic suspicion with physical examination and imaging studies. Treatment will vary according to clinical and diagnostic precocity.