Gasterointestinal Stromal Tumor (GIST) is a mesenchimal tumor. Mostly originate from stomach however small intestine, esophagus, colon, and rectum are another sits of tumor growth. Rarely it originate in extra intestinal sites such as the omentum, mesenteries, or retro peritoneum. They are often asymptomatic and are detected as an incidental finding or after evaluation of nonspecific symptoms .However this tumor can present as a palpable abdominal mass, with abdominal pain and or gastrointestinal bleeding. In this manuscript we represent a patient with GIST of the stomach mesentery.