Gastric leiomyoma is the most frequent type of non-cancerous gastric neoplasm. The prognosis for gastric leiomyoma is better than adenocarcinoma, leiomyosarcoma and the others, so correct diagnosis is essential for proper management. Authors analysed 8 cases of gastric leiomyoma, diagnosed by operation in 6 cases and endoscopic biopsy in 2 cases, at Kyung Hee University Hospital from December 1984 to October 1988. The results were as follows; 1) The size of gastric leiomyoma ranged from 3 to 10 cm with the mean diameter of 5 cm. 2) The tumor was located at fundus in 2 cases, body in 2 cases and antrum in 4 cases. 3) The echogenicity of mass compared with liver parenchyme was hypoechoic in 5 cases (63%), isoechoic in 2 cases (25%) and heterogeneous in one case (12%). 4) The growth patten of tumor was endogastric in 5 cases (63%) and exophytic in 3 cases (37%). 5) Ulceration was found in 5 cases (63%) at central part of tumor. 6) Ultrasonographic diagnosis of gastric leiomyoma was made in the presence of following contions. ① A small hypoechoic mass with smooth margin. ② Endogastric growth continuous to submucosa. ③ Intact mucosa surrounding mass.④ Small ulceration without tumor necrosis.