Two patients with Cricopharyngeal achalasia have been treated at the Clínica Infantil "La Paz" (Madrid) in the last 20 years. They were one and a half, and four and a half months old at the time of operation. The postoperative period and follow-up has been satisfactory. Clinical symptoms in both of them were cough, cyanosis, regurgitation and aspirative pneumonia. One of them came with the diagnosis of congenital esophageal stenosis, and the other one with the diagnosis of tracheoesophageal fistula. The diagnosis was confirmed by endoscopy and barium-X-ray. Section of the Cricopharyngeus muscle was curative and recovery of the normal function has been complete.