Five cases of infants, who had Peanuts as foreign bodies of bronchi, were reported.It was proposed that in treating peanuts as bronchial foreign bodies, following notices must beborn in mind:1) Precise and thorough informations must be inquired from the infant or persons accompanied, as to history of present illness, possibility of aspiration of peanuts, and situation of onset of coughor stridor.2) Chest X-ray examination should be performed especially both in inspiratory and expiratory states.Differences in chest roentgenogram taken in inspiratory and expiratory states as well as atelectasis, emphysema of lung or deviation of mediastinum would often suggest lodging site of foreign bodyof bronchus.3) Ventilation bronchoscopy must be carried out under total anaesthesia as soon as possible.4) In removing peanuts through bronchoscope, fenesterated forceps are recommended to beused, not to crush peanuts softened during long lodging in the bronchus. The tip of forceps mustbe corrected to the gap around peanuts in bronchial wall.5) In case remaining of a part of peanuts suspected, re-examination of ventilation bronchoscopyshould not be hesitated.Postoperative course of the infant must be watched strictly and carefully.