Objective To study the clinical,endoscopic an d pathologic features of primary gastric malignant lymphoma,and to improve its diagnostic efficiency.Methods The clinical,pathologic and endoscopic data in twenty two cases of primary gastric malignant lymphoma were retrospectively reviewed. Results In these cases,the common presentations include abdomi nal pain、anorexia、loss of weight etc. These patients were all examined by endo scopy with protruding,ulcerative and infiltrative lesions. Submucosal lesions w ith hypo echoes were found by endoscopic ultrasonography in six cases,and enlar ged lymph nodes were found on the exterior of stomach in two cases. Conclusion The primary gastric malignant lymphoma has a rather low incidence,and without specific clinical manifestations, hard to differentia te gastric ulcer from cancer through the manifestation in endoscopy. Further com bination of endoscopy, endoscopic ultrasonography and pathology are helpful to i ts correct diagnosis.