Pancreatitis associated with pregnancy is rare. We treated a patient who developed acute pancreatitis in the latter stage of pregnancy and was found to have hyperparathyroidism by a subsequent study. The patient was a 25-year-old female who showed epigastralgia in the 33rd week of pregnancy. Despite symptomatic therapy, symptoms were aggravated, accompanied by a barely audible fetal heart sound. Emergency laparotomy performed for abruption of the placenta revealed voluminous cloudy ascites, and the epigastric region, following fetal delivery, disclosed an enlarged pancreas, with partial necrosis. The diagnosis of acute pancreatitis associated with pregnancy was established, and pancreatic mobilization and intraperitoneal drainage were performed. Post-operative hematology disclosed elevations of serum Ca and parathyroid hormone, indicating an additional complication of hyperparathyroidism. Parathyroid adenoma was resected 21 months after the opearion for acute pancreatitis.