Abstract:Recently the association of hypersomnia and respiratory insufficiency without lesion in the respiratory organ has attracted attention of many investigators. Obese patients with such a condition have been called the Pickwickian syndrome. In this report, two non‐obese patients with a similar condition were presented, one with micrognathia and frequent apneic episodes during sleep, and the other with laryngeal stenosis due to paralysis of the bilateral laryngeal nerves and chronic laryngitis. Tracheostomy had a prompt and long‐lasting therapeutic effect to make their sleep stable and also to relieve their excessive daytime sleepiness. These findings suggest that the obstruction or stenosis of the upper airway during sleep disturbed their nocturnal sleep, and that their excessive daytime sleepiness was a phenomenon compensating for their disturbed nocturnal sl