Although etiology of Kawasaki disease has not been precisely determined, it has been speculated that there was an association with a variety of bacterial and viral agents because of the seasonality of this disease. Some viruses including human adenovirus have been isolated from patients with Kawasaki Disease. Adenoviral infection may mimic Kawasaki disease clinically but it may also be detected in patients with Kawasaki disease. We have presented two patients with Kawasaki disease who infected with human adenovirus in this case report.