[eng] A 20-year-old man presents abdominal pain and diffuse peritoneal irritation. The computed tomography reported pneumoperitoneum and peritonitis secondary to hollow viscus perforation. An urgent intervention was performed, showing Meckel's diverticulum with a perforation on its vertex. It was decided the resection of the ileum including the diverticulum, finishing with a manual end-to-end anastomosis. Meckel's diverticulum is caused by the failure of the involution of the omphalomestheric duct. In 4-6% of cases it can cause complications. The preoperative diagnosis is difficult because the radiological and clinical findings can resemble other acute abdominal disorders.