We examined relation between mucosal findings of tongue and gastric mucosal lesion by comparison photographic findings of tongue with gastroendoscopic findings of stomach. Subjects of this study were 115 cases undergoing gastroendoscopic examination in our hospital. The state of tongue surface was evaluated by thickness and color of tongue coating and tongue fissure. Especially, the tongue area was divided into 9 sections in order to investigate distribution of coating and fissure. The cases showing thick coating at the lateral sections of tongue were significantly numerous in patients who had gastric ulcer, compared with the cases in those who had no gastric ulcer. From these results, it was suggested that inspection of tongue mucosa could become one of the useful examination of oriental medicine for gastrointestinal disease.