A case of proximal jejunal obstruction by a congenital band is reported. The band ran from the antimesenteric wall of the proximal jejunum just distal of the Treitz's ligament to the root of the mesentery. Lysis of the band and enterotomy were performed to make sure no intrinsic obstruction cured the patient. No recurrence was found after 3 months of follow-up. To the best of the authors' knowledge, this is the second case with an anomalous congenital band causing proximal jejunal obstruction reported in the English-language literature.