A technique for construction of a functional loop colostomy is described for the management of colonic injuries in which complete fecal diversion is not required. The colostomy and mucous fistula are converted into a functional loop colostomy at the initial procedure and exteriorized through a single stoma. Subsequent colostomy closure is simplified. Intraperitoneal colostomy closure can usually be performed by mobilizing the colon at the stoma site without resorting to formal laparotomy.