Jejunal diverticulosis is a rare acquired-disease which courses asymptomatic in most cases. In spite of the fact that there are some publications of this entity in pediatric patients, most symptomatic cases have been found in adults. Reported herein is the case of a patient that presented to the emergency room with signs and symptoms suggestive of an acute abdomen. After diagnostic workup and operative management, presence and complications of a jejunal diverticulum were found to be the cause of the abdominal pain.