BACKGROUND In Mongolia, Gastric cancer is second most common cancer. 904 (603-men, 301- women) new gastric cancer cases reported in 2016 and is about twice as common in men than women. The number of new gastric cancer cases was 29.3 per 100.000 men and women in Mongolia. A greater percentage of total gastric cancer cases were III, IV stage(85.5%). In 2016, The Orkhon province had the highest rate in Mongolia (54.3 cases per 100.000 men and women). In Mongolia and Orkhon province, gastric cancer remains an important public health problem. METHODS A total of 60 gastric cancer cases diagnosed at Medipas Hospital between March 2016 and October 2017 were analyzed retrospectively. RESULTS The average age of all gastric cancer patients was 59.75±9.91 years. The men to women ratio was 1:0.28. The most common location of gastric cancer was upper third(59.7%), followed by middle third (26.9%) and lower third (13.4%) of the stomach. Thepercentage of total gastric cancer cases were advanced gastric cancer (66.7%) than early gastric cancer (31.7%). And One case(1.6%) diagnosed MALT lymphoma. 55% of total gastric cancer cases were treated by Endoscopic submucosal dissection and Gastroectomy surgery. CONCLUSION One reason the overall survival rate is poor in the Mongolia is that most stomach cancers are diagnosed at an advanced rather than an early stage. The stage of the cancer has a major effect on a patient’s prognosis.