Small cell carcinoma is derived from APUDcells of any parts of the body. Usually the cases are discovered in the lungs and have poor prognosis. Small cell carcinoma has been increasingly reported in various organ outside the lungs, such as the larynx, thymus, esophagus, stomach, pancreas, uterine cervix, and prostate. Primary small cell carcinoma of the stomach is extremly rare. The histology of the tumor was similar to that of ordinary small cell carcinoma of the lung, and the secretory granules were identified by electron microscopy. We report a patient with gastric pure small cell carcinoma who treated by a radical total gastrectomy and chemotherapy.