We have observed foreign bodies in food and air passage in 270 cases during the period from Sep. 1976 to Aug. 1981 in E.N.T. department of Han Gang Sacred Heart Hospital. The following results were obtained. 1) Distribution of location was 256 cases (94.8%) in food passage and 14 cases (5.2%) in air passage. 2) Age distribution was predominent in age under 5 showing 198 cases (77.7%) in food passage and 10 cases (71.4%) in air passage. In the age under 5 group in the cases of food passage, coin was the most frequent material : 175 cases (87.9%), and in the cases of air passage, plastic material was the most frequent material : 5 cases (50.0%). In the age over 40 group in the cases of food passage, bony pieces was the most frequent material : 8 cases (47.1%), and the meats was second frequent material : 6 cases. 3) Male seem to be more frequently involved than female in both cases of food and air passage. Food passage ; Male : Female -- 151 : 105 (1.4 : 1), Air passage ; Male : Female-10 : 4 (2.5 : 1). 4) Coin was the most frequent foreign body in food passage (199 cases-77.7%). Others were metals, bony pieces, and meats. Plastic meterial was the most frequent foreign body in air passage (7 cases-50%). 5) In the locality of food passage, the first narrowing of the esophagus was the most frequent site, and air passage, the bronchus-especially right bronchus-was the most frequent site. 6) During of lodgement was 218 cases (85.2%) within 24 hours in food passage and 9 cases (64.3%) within 24 hours in air passage, and in air passage one case each other 25 days later & 5 months later after the accident.