To provide a therapeutic agent for inflammatory bowel disease. The therapeutic agent for inflammatory bowel disease contains, as an active ingredient, a uracil derivative or a pharmaceutically acceptable salt thereof, represented by formula (1).本發明提供一種炎症性腸疾病治療藥。該炎症性腸疾病治療藥係以通式(1)所表示之尿嘧啶衍生物或其藥學上所容許之鹽為有效成分者: