To provide a medicine and/or food and drink having preventing and/or treating effect on ischemic enteropathy, having low side action and high safety and ingestible over a long period.

The agent for the prevention and/or treatment of ischemic enteropathy contains milk whey protein and/or hydrolyzed milk whey protein as an active component. The invention further provides a food or drink containing milk whey protein and/or hydrolyzed milk whey protein, having preventing and/or treating effect on ischemic enteropathy and labeled to notice that the food, etc., is to be used for the prevention and/or treatment of ischemic enteropathy.