123 patients suffering from carcinoma of the larynx were treated by radical radiotherapy at Queen Mary Hospital in Hong Kong between 1970 and 1977. The results are presented. 69(56.1%) were in the supraglottic, 53(43.1%) in the glottic, and 1(0.8%) in the subglottic regions. The incidence of cigarettes, heroin, and opium smoking, and that of alcohol consumption is analysed. The overall actuarial 5-year survival rate for supraglottic cancer was 47.7%, and 80.4% for glottic cancer. The solitary patient with subglottic cancer was alive 9 years after radical radiotherapy.