Paraduodenal hernias rarely present with symptoms in children. We report a case of a right paraduodenal hernia associated with enteric duplication cyst that caused intestinal suboclussion in a 9-month-old female infant. Paraduodenal hernia was detected by contrast-enhanced computed tomography. In a review of the English-published literature, we have not found other reports of the association of paraduodenal hernia and enteric duplication cyst. A high index of suspicion is required for detecting paraduodenal hernias in children, and abdominal computed tomography is the most specific imaging study for their preoperative diagnosis.