A 68-year-old woman presenting with anorexia and epigastric pain was diagnosed with metastatic pancreatic cancer and idiopathic thrombocytopenic purpura(ITP). Chemotherapy was initiated with S-1. Subsequently, gemcitabine was administered in combination with prednisolone. Her platelets returned to normal after the treatment with steroids and chemotherapy, but the treatment could not be withdrawn completely. Pancreatic cancer presenting as idiopathic thrombocytopenic purpura has rarely been reported in the literature. Here, we present our experience and discuss a case of pancreatic cancer complicated with ITP.