Laryngomalacia is a disease diagnosed by abnormal dynamic changese in the supraglottic structure. Videofibrolaryngoscopy affords a continuous observation of these dynamic changes and it is a valuable tool for making a precise diagnosis. We experienced 103 cases of laryngomalacia in our hospital between June 1992 and July 1995. The abnormal dynamic changes in the larynx could be divided into 3 types as follows. Type A: the cuneiform cartilages are redundant and prolapse during inspiration; type B: the long, tubular epiglottis curls back upon itself during inspiration; type C: posterior inspiratory displacement of the epiglottis against the posterior pharyngeal wall or vocal folds. In this series, the mean age for recovery in infants was 12.2 months. The mean ages for recovery in types A,B,C were 14.1 months, 6.4 months and 8.2 months, respectively.