Meconium peritonitis most often is associated with congenital intestinal obstruction and meconium ileus. Uncommonly, other etiologies are identified. Hyperimmunoglobulin E syndrome (Job's syndrome) is a rare genetic disorder that is characterized by recurrent staphylococcal respiratory and skin infections in addition to elevated serum IgE levels. There have been 2 previously reported cases of intestinal complications associated with Job's syndrome. The current case is the third such case and is the first report of meconium peritonitis in a patient with hyperimmunoglobulin E syndrome. The patient presented with a meconium thorax as a result of a concurrent congenital diaphragmatic hernia.