Described first in 1980s, allergic fungal sinusitis that is a chronic noninvasive fungal sinusitis is a relatively uncommon disease in adults. Nasal polyposis, peculiar imaging features, and allergic mucin are its main characteristics. Although case report and/or series about this disease have been reported, its occurrence in pediatric population remains rare. Pathogenesis of this illness is the same in both children and adults, but some clinical characteristics are different, especially at presentation. The clinical picture and treatment of this disorder in children are analyzed.