Chest radiographic and high-resolution computed tomography findings of 3 patients with inhalational lung injury due to nitrogen dioxide were reported. Chest radiographs showed ill-defined round opacities which tended to coalesce in both lung with inner lung predominance. High-resolution computed tomography showed ground-glass attenuation and ill-defined centrilobular nodules distributed predominantly in the inner and middle lung zones. One patient showed progression of opacities, which corresponded to the findings of acute respiratory distress syndrome.