We present 20 cases of primary non-Hodgkin lymphoma of the stomach. Histological classification, staging, age of patients and therapeutical approach were evaluated. Median overall survival was 30 months, and 5-year survival was 44%. In our small series, the age of the patients plays an important role: median overall survival is 18 months in patients greater than 60 y.o. (compared to 90 months in patients less than 60 y.o.) and 5-year survival 12.5% (compared to 62%).