Abdominal pregnancy is the rarest ectopic pregnancies, with an incidence of 1 per 10,000 live births, and life-threatening because the symptoms are not specific and diagnosis is made after abdominal pain, amenorrhea and vaginal bleeding occur. We present a rare case of abdominal pregnancy in a 31-year-old Indonesian woman with severe abdominal pain within 24 hours before hospital admission, accompanied by nausea, vomiting, dizziness and weakness. She felt the pain increasing since the last 2 weeks and limiting her movement. She has a history of a left tubal pregnancy 5 years ago. Ultrasonography examination revealed an ectopic pregnancy, and she was rushed to the operation room for emergency exploratory laparotomy. An abdominal pregnancy was found, located in the right adnexa with excessive fluid in cavum Douglass and a foetus in around 11-12 weeks of gestation accompanied by free fluid in the subdiaphragmatic, subhepatic and pelvic cavity. The surgery was a successful, four units of whole blood were transfused, and the patient was safely discharged from the hospital. The current concept on management of abdominal pregnancy supports immediate surgical intervention with pregnancy termination, as found in this case, because the patient's condition is hemodynamically unstable indicating hemorrhagic shock correlated with massive hemoperitoneum. A prompt diagnosis and good teamwork in treatment plays an important role for such a life-threatening condition to avoid maternal morbidity and mortality in a case of abdominal pregnancy.