Insertion of abdominal drainage after appendectomy is controversial. We report on a case of duodenal perforation due to a silastic open drainage tube placed in the right para-colic gutter after appendectomy for perforated appendicitis. This case offers a clue against too liberal usage of abdominal drainage after appendectomy. Conservative management of bowel perforations secondary to abdominal drainages should be attempted in the absence of generalised peritonitis.