Pancreatitis complicated by gastric wall hemorrhagic is rarely reported. The imaging findings of focal pancreatitis with gastric wall hemorrhage can mimic a disease entity of gastric origin. We report a case of gastric subserosal hematoma developing in a patient with focal pancreatitis. The patient was initially scheduled to receive subtotal gastrectomy due to a presumed diagnosis of a disease entity of gastric origin. Computed tomography of the abdomen revealed focal pancreatitis that had eroded the gastric wall resulting in subserosal hemorrhage. The radiologist informed the surgeon of the possibility of focal pancreatitis complicated by gastric hemorrhage. The gastric subserosal hematoma was treated with percutaneous drainage and the patient recovered uneventfully.