The records of eight patients treated for intestinal obstruction resulting from bands that have no identifiable embryologic or acquired basis were reviewed retrospectively. All patients presented with symptoms and signs indicative of intestinal obstruction. Patients older than 2 years of age additionally had a history of chronic abdominal pain. One thick anomalous congenital band with blood vessels in it was found to be the cause of obstruction in each patient. Bands were located between ascending colon and terminal ileum in four patients (50%), ligament of Treitz and terminal ileum in two patients (25%), right lobe of liver and terminal ileum in one patient (12.5%), and right lobe of liver and ascending colon in one patient (12.5%). The obstructive mechanisms were compression of bowel by band in five patients (62.5%) and entrappment of an intestinal loop between the band and mesenterium in three patients (37.5%). These bands are suggested to be the anomalies of mesenterium that may cause intestinal obstruction and chronic abdominal pain in children.