The fourth bronchial pouch fistulae is the lesion of the fourth bronchial-pharyngeal duct in development of the embryo. 20 cases of this disease were diagnosed, operated and followed-up in the institute of ENT, from 1995 to 1997. 11 females and 9 males were affected; It manifested itself by recurrent episodes neck abscess, especially on the left side (95%). 13 fistulous tracts were found on operation with 86% of retrocartilaginous course.