Much less frequently stomach cancer is found in pregnant woman than in general young man, the misdiagnosis usually takes place for the disease. 17 patients of this series accounted for 0.97% of all patients with stomach cancer during the same period (17/1752). Stomach cancer in pregnancy and breast feeding was usually advanced at the time of diagnosis, and the prognosis was very poor. The predominant pathological features of the cancer were extensive infiltration (17 patients), diffuse growth pattern (13 patients) and undifferention of carcinoma (13 patients) with serious lymphonode metastasis. We suggest that the gastrofiberscopic and ultrasonographic examination can be used with safely at any time during pregnancy and facilitate early detection of stomach cancer in the pregnant women, especially in those who had been previously ill with precancerous diseases or lesions. The treatment of the disease was also discussed.