A man in his 70s was concurrently suspected of having a submucosal tumor(SMT)of the stomach and a liver tumor during a medical examination. Abdominal contrast-enhanced CT scan revealed S8 hepatocellular carcinoma(HCC)and an SMT of the stomach, which was strongly enhanced from the early to the later phase. Upper gastrointestinal endoscopy revealed a 20 mm SMT in the antrum of the stomach. Endoscopic ultrasonography showed a hyperechoic tumor in the fourth layer of the gastric wall. T2-weighted MRI showed a 25 mm SMT in the antrum of the stomach with a faint high signal intensity compared with that of the gastric wall. The patient was diagnosed with HCC and gastric glomus tumor, and a liver segmentectomy and a local gastrectomy were performed. Immunohistochemistry of the SMT revealed the expression of α-SMA but no expression of desmin, c-kit, CD34, or S-100. Therefore, a diagnosis of a Glomus tumor of the stomach was made. Gastric Glomus tumors are very rare; therefore, we have reviewed some citations and would like to discuss our case.