Branchial cleft anomaly, first reported by Huncyowski in 1789, is not a rare neck pathology in pediatric patients. According to the difference of it’s morphology, it is classified into cyst, sinus and fistula, which result from incomplete obliteration of branchial cleft or pouch in embryo development. It usually develops unilaterally, and bilateral lesions are very rare. We experienced a case of bilateral brandial cleft anomalies in Auguse, 1995. The 20-year-old female has suffered from a mass at the anterioinferior margin of her right sternocleidomastoid muscle and a small pit discharging intermittently in the opposite neck since childhood. Physical examination and radiology disclosed a 3.0*3.0cm fluctuated mass in the right neck and a sinus in the left neck. Bilateral neck lesions were excised completely, and they were proven to be bilateral branchial cleft anomalies by pathology department. No recurrence was noted until now.