Otological study of 41 cleft palate children (6 unrepaired clefts and 35 repaired clefts) was carried out. Unrepaired cleft palate children showed the middle ear effusion in 42% and abnormal tympanograms of either B or C type in 75%. On the other hand, repaired cleft palate children showed abnormal tympanograms in 41%. Thus it was suggested that cleft palate surgery might have some effect upon improvement of middle ear disturbance. It appeared, however, that the improvement of middle ear disease could be related to growth, because children above 7 years showed neither hearing impairment nor ear disease. It was found that though cleft palate children had more pathological ear than normal children, it decreased either by surgery or as children grow older, and that tubal function in cleft palate children had close relation to middle ear disease.