Simple hepatic cyst is common benign lesion that occurs in 5% to 10% of the general population. Simple hepatic cyst is usually asymptomatic and requires no treatment. However, complication including intracystic hemorrhage, infection, intraperitoneal rupture, torsion, inflammationand obstructive jaundice can occur in about 10% and hemorrhage or infection are most common complications. Although spontaneous rupture occasionally occurs, cystic rupture into peritoneal cavity may be mainly caused by trauma. There is no standard strategy for management of hepatic cyst rupture. If acute pain develops, operation or percutaneous drainage are helpful. 37-year-old woman complained of acute severe right upper quadrant abdominal pain with no trauma history. Ultrasound and CT scan showed 12cm subcapsular cystic mass and hemorrhage into the peritoneum. She had no evidence of parasite infection and malignancy on the stool, serology and image. After percutaneous drainage of 8.5 French pigtail catheter. abdominal pain subsided and size of subcapsular cyst decreased into the 7cm on follow up image after drainage of dark blood. Here, we report a case of spontaneous subcapsular hemorrhage of huge hepatic cyst presenting with acute abdominal pain.