Objective: Aspergillus fumigatus and Aspergillus niger are Aspergillus species that generally invade cavitary structures of the lungs and form fungus balls of Aspergillus hyphae, fibrin, mucus, blood, and inflammatory and epithelial cells; they are very rarely seen in extra-respiratory organs and systems. Tracheal diverticulum is a rare and mostly asymptomatic entity usually found in the paratracheal region, but its etiology and pathophysiology is not fully known. An interesting and very rare case of aspergilloma located in a tracheal diverticulum is presented in this article.