Appendiceal duplication is an extremely rare entity in adulthood. It is usually diagnosed incidentally during laparotomy performed for another indication. Herein, we present a case of double appendicitis in a 31-year male who underwent laparotomy with a preliminary diagnosis of acute appendicitis. Two appendices attached via separate bases to a cecum were identified intraoperatively. One of them was thick-walled, partial 1 perforated from the apex region and the other one was normal looking. Both had their own radices. They were stuck together at their apical parts. Appendicectomy was performed for both of them. Due to the fact that appendicectomy is the most common abdominal surgery procedure, surgeons should always bear in mind this rare anomaly, in order to prevent complications. Key Words: Appendiceal duplication, Cecum, Anatomic variation.