Fungal infections of the nose and paranasal sinuses are uncommon; Aspergillus is the most frequently isolated fungal pathogen. Invasive aspergillosis is commonly seen as an opportunistic infection in the immunocomprised, debilitated host. Whereas fulminant infection in the otherwise healthy patient is rare, in the immunocompetent host with persistent signs and symptoms of sinusitis despite appropriate medical management, aspergillosis should be considered. Treatment of paranasal sinus aspergillosis requires correction of immunologic deficits, if possible; aggressive surgical debridement to provide adequate drainage and aeration of the sinuses; and adjunctive antifungal chemotherapy. The authors present an unusual case of invasive aspergillosis of the paranasal sinuses in an immunocompetent host.