This survey is based on our own experiences and a study of the literature. The CO2 laser has certain advantages in the surgical treatment of otosclerosis, both in the primary operation and in reoperation. In rhinal surgery the argon laser has been used with good results in Osler's disease. Laser surgery is not recommended for vasomotoric rhinitis and polyposis. The CO2 laser has improved the quality of treatment of laryngeal papilloma. With high precision and minimal bleeding the postoperative voice is better than with conventional surgery. The CO2 laser can also be used to exstirpate small malignant tumours of the tongue and leukoplasia of the oral mucosa. Healing is rapid and involves relatively little pain. The postoperative functional result is usually good, due to moderate formation of scars.