The postoperative adjuvant chemotherapy with 12 cycles of 5-FU and mitomycin-C has been administered in 162 patients with stage II or lll gastric adenocarcinoma after curative gastric resection. 1) After a median follow-up time of 81 months, 94/163 treated patients recurred (58%). The sites of recurrent cancer were as follows: loco-regional, 419, peritoneal, 24%, distant metastases, 26%, multiple sites, 9%. 2) The 5-year disease free survival rates were 36.8% 3) The 5-year overall survival rates were 45.0% and the median survival was 50.2 months. 4) The number of lymph nodes involvement and the T stage affected disease free and overall survival. 5) The FM regimen was well tolerated, and produced moderate bone marrow suppression, anorexia, nausea, vomiting and diarrhea.