Background: Duodenum is the second most frequent location for a diverticulum in the digestive tract next to the colon. Duodenal diverticulum occurs in 20% of the general population and is generally asymptomatic. Complications such as perforation are exceedingly rare, with only few cases reported in the literature. Case Report: Here, we present a case of a 70 year old, male patient who was admitted with acute abdomen and intra-operatively diagnosed as perforated duodenal diverticulum. Conclusion: Early diagnosis of perforated duodenal diverticulum is a challenge and clear guidelines for the management of this rare entity is still lacking.