Introduction: The laryngomalacia is defined as a disorder characterized by the collapse of the laryngeal cartilages during inspiration, with obstruction of the glottis. It is the most common congenital anomaly of the larynx, as well as the most frequent cause of intermittent stridor in children. Laryngomalacia resulting from a neuromuscular immaturity cause supraglottic hypotonia and bring these sagging structures during inspiration. The stridor is exacerbated by crying, shaking, or exercise and improves with neck extension. The diagnosis is made by bronchoscopy with the child breathing spontaneously.