Alimentary tract duplication is a rare congenital malformation that usually presents with gastrointestinal obstruction. Colonic duplication is associated with other anomalies as duplication of the anus and genitourinary tract. It is uncommon and very few cases have been reported were a colonic duplication is associated with intestinal malrotation. We present a case of a newborn that presented with a double bubble sign in a prenatal ultrasound that resulted to be the colonic duplication and not the typical duodenal obstruction.