Background: Meckel's diverticulum is the most common anomaly of the intestine. It is usually asymptomatic but could also be symptomatic with complications such as bleeding, intestinal obstruction, and inflammation.

Case Report: Two weeks after gangrenous appendectomy of a 44 years old man in Shahid Beheshti Hospital in Kashan city, Iran, he complained of abdominal pain, nausea, bilious vomiting and constipation. Considering him as a suspicious case of intestinal obstruction, we performed laparatomy in which torsion of 10 cm. length of Meckel's diverticulum was confirmed.

Conclusion: Since the complications of Meckel's diverticulum are rane in adults, this diagnosis is supposed to be considered as one of the probable reasons of acute abdomen surgery. Although, the common place of Meckel's diverticulum is at 40-60 cm away from ileal operculum, it is recommended to assess ileum at a 100 cm distance from it.