Emphysematous gastritis is a rare entity of infectious gastritis caused by gas-forming organisms and only 32 cases have been reported. CT is helpful in the dianosis particular-ly in mild cases that there is only a small amount of gas. Typical CT findings of emphysematous gastritis are gas bubbles within the irregular thickenined gastric wall and dilated stomach filled with secretions debris and a large amount of gas. We report a case that was diagnosed by CT and operation.