DISCUSSION: This is the first report of adenovirus 7 pneumonia occurred in previously healthy pregnant woman. Our patient had prolonged fever, cough and dyspnea, normal WBC with lymphopenia, bilateral lung infiltrates, and pleural exudates dominated by mononuclear cells. It was in accordance with the scenario of adenoviral pneumonia as previously reported . There were no effective antiviral treatment to adenoviral pneumonia, for our patient, proper supportive care, such as oxygen therapy, non-invasive mechanical ventilation, defervesce and obstetric treatment lead to successful cure. Fortunately, there are neither adverse pregnant outcomes of our patient nor teratogenesis of her baby except transient threatened abortion. Previous studies showed pregnant women with viral pneumonia have a higher mortality rate, higher rates of both intubation and ICU admission than the general population.