Distal pancreatectomy combined with total gastrectomy for gastric carcinoma was evaluated in regard to the availability and quality of life for patients. We performed a question-naire survey of their daily life, especially regarding postpancreatectomy diabetes, for 67 patients passed 5 years after total gastrectomy inclusive of five cases without pancreatectomy as control. Eleven cases developed diabetes mellitus which needed insulin injection after distal pancreatectomy excluding three patients with glucose intolerance before operation. These were 19% of cases performed pancreatectomy, while there was no diabetes in cases without pancreatectomy. The incidence of postpancreatectomy diabetes was 60 per cent of the cases which underwent Appleby operation (65% pancreas resection), while it was 50 percent of the cases which underwent total gastrectomy combined with distal pancreatectomy (50% resection). There is significant difference at < 0.05 level. The incidence of postpancreatectomy diabetes was increased as passing of years after operation. These results suggest that distal pancreatectomy combining total gastrectomy improves the prognosis of patients with nodal metastasis. But considering the occurrence of postpancreatectomy diabetes, it should be emphasized the adequate indication is needed for the operation, and close and long-term follow up is essential for keeping QOL.