<;P>;PROBLEM TO BE SOLVED: To provide a pharmaceutical preparation for the treatment and/or prevention of inflammatory bowel diseases and enabling safe and continuous intake and provide a food for the treatment and/or prevention of inflammatory bowel diseases. <;P>;SOLUTION: The agent for the treatment of inflammatory bowel diseases contains a 2-6C short-chain fatty acid as an active component. The agent is orally administered at a daily dose of preferably 10-2,000 mg for adult to prevent, reduce, suppress or ameliorate intestinal inflammation and/or intestinal ulcer. <;P>;COPYRIGHT: (C)2006,JPO&NCIPI