In one autopsy case, the structure of the fineblood vessels was examined clinicopath-ologically by injecting gelatin-added barium into the fundic varix. (1) The fundic varix was situated mainly in the mucosal substratum. (2) The inflow path, varix, and the outflow path were composed of a continuous blood vessel of an almost uniform diameter. There was no direct connection between the inflow and the outflow paths outside the gastric wall. (3) Many collecting venulae were observed in the area from lamina muscularis mucosae toward the surface, in lamina propria mucosae just above the fundic varix, and in the upper part of the stomach body. No direct connection was noticed between these collecting venulae and the fundic varix. These findings are beleived to be important in selecting an effective method of treatment for fundic varices hemorrhage.