Necrotizing enterocolitis, which is localized only in the jejunum, is very rare and this entity canot be found in the English medical literature. We report the CT findings of necrotizing jejunitis in a 45-year-old man, which showed ring like and mottled air shadows between the contrast filled bowel lumen and its wall, dirty measenteric fat and prominent mesenteric vascular enhancement. We regard CT is a useful diagnostic method of necrotizing jejunitis.