The gastrointestinal stromal tumor was finded in a female patient complaining continous abdominal obesity without any gastrointestinal symptoms. The tumor was sized 5.5~7~10 cm and expanded from stomach to the space between stomach and pancreas. The surgical resection was carried out for treatment. This case means that careful physical examinations should be done when there are no gastrointestinal complains in a abdominal obesity patient.