Ileoileal intussusception due to Meckel's diverticulumIntroduction: Intussusception is the most common cause of intestinal obstruction in infants. At this age, most cases are idiopathic and involve ileocecal locations; meanwhile ileoileal invaginations caused by an anatomic abnormality of the gastrointestinal tract, such as Meckel's diverticulum, are rare. Objective: To report two cases of infant ileoileal intussusception due to Meckel's diverticulum. Case reports: The first patient was a 6 month-old female infant who presented colicky abdominal pain associated with vomiting and bloody stools. The second patient, a 23 month-old male infant with a history of Tetralogy of Fallot and corrective surgery, and DiGeorge syndrome, who consulted the specialists for health worsened due to vomits and severe dehydration, presenting the following days, semi-liquid and non-bloody stools. Conclusions: Ileoileal intussusception is rare in infants, especially those caused by anatomical changes such as Meckel's diverticulum. This association has no pathognomonic signs and its study does not differ from the usual study of intestinal intussusception, but it is important to consider it for management purposes as it involves surgical intervention and considering that the pneumatic reduction is contraindicated.