We present the results of a retrospective study of 467 patients treated with conservative surgery for glottic carcinomas at the ENT department of the "Gregorio Maranon" Hospital between 1962-1993. The disease was staged using the criteria set forth in 1988 by the AJCC, and 27.7% patients were intermediate to advanced stages. Our theoretic treatment protocol is presented. The 5 years uncorrected actuarial survival related to stage was 85.6%, 71.4% and 71% for stages I, II and III respectively. In stages I and II local failure occurred in 22.4% when patients were treated by laryngofisure and 10.8% when treated with hemilaryngectomy. The 5 years local control related to stage was 92.6%, 81.72% and 73.24% for stages I, II and III respectively. In stages I and II the 5 years survival with voice was 75.2% when the patients were treated with radiotherapy and 84.9% when treated with partial laryngectomy. Functional results have been evaluated according to a three grade scale. Good and fair results were 91.1% for the quality of voice, 99.7% for swallowing and 97.6% for respiration.