[en] The objective of this was to evaluate the contribution of concomitant chemoradiotherapy in the treatment of locally evolved larynx carcinomas. The results of the series are comparable to these ones got by several studies. The concomitant chemoradiotherapy tends to give a good local control with the advantage of organ conservation, at the price of an acceptable toxicity.The improvement of larynx cancer prognostic is through an early diagnosis but the fight against smoking constitutes the only means of prevention. (N.C.)