Congenital laryngeal cysts are a rare cause of stridor in the neonate. Nevertheless, delayed diagnosis and treatment can cause life-threatening airway obstruction. Even though the diagnosis is easily made by careful inspection, treatment results often in recurrence. These facts are illustrated by a case of a baby with a saccular cyst. Immediately after diagnosis and 5 days later the cyst was de-roofed using a CO2 laser via an endolaryngeal approach. Because of a second recurrence an excision of the cyst was performed via a lateral cervical approach.