Intraductal papillary mucinous tumor (IPMT) of the pancreas is a distinct entity characterized by intraductal papillary growth and thick mucin secretion. Prolonged postoperative survival can be anticipated in many IPMT cases. However, IPMT of the pancreas was reported to be associated with a high incidence of nonpancreatic neoplasms and these nonpancreatic neoplasms have potential prognostic significance in patients with IPMT. Recently, we experienced a case of IPMT of the pancreas accompanied by gastric cancer in a 72-year-old woman. The main pancreatic duct was incidentally found to be dilated on an abdominal computed tomography performed for staging of gastric cancer. A subtotal gastrectomy and near-total pancreatectomy were carried out. Histopathologic examinations of the resected specimens confirmed the diagnosis of early gastric cancer (T₁N₁Mо) and IPMT of the pancreas, carcinoma in situ, combined type. We report this interesting case with a review of the literature.