CT scans of 52 patients with advanced gastric cancer were reviewed, and the layer structure of the gastric wall was analyzed. Administration of 600 ml water, orally, expanded the gastric wall, while patients were in the prone position. Intravenous infusion of contrast media was routinely administered. We found that the normal layer structure of the gastric wall could be shown despite the cancer in the lesion. Borrmann 3 and 4 types. We guess that CT has a possibility in the assessment of the spread in the wall of gastric cancer.