There were a few reports to compare the treatment results of glottic and supraglottic carcinoma. We investigated the difference of glottic and supraglottic carcinoma. From 1967 through 1985, 338 cases with early glottic (T1: 210, T2: 52) and supraglottic carcinoma (T1: 34, T2: 42) were treated with the conventional fractionation of radiation and evaluated the tumor response during radiation at the Department of Radiology, Osaka University Hospital. The ten-year actuarial survival rates of T1, T2 glottic and T1 and T2 supraglottic carcinoma were 63%, 64%, 58% and 46%, the corresponding ten-year cause-specific survival rates 92%, 89%, 88% and 78%, and the corresponding ten-year local control rates 76%, 67%, 69% and 59%, respectively. Tumor clearance rates of T1 and T2 glottic and T1 and T2 supraglottic carcinoma at 40 Gy were 68%, 40%, 35% and 24%, respectively. The local control rate of the tumor which disappeared at 40 Gy was 84%, that persisted at 40 Gy and disappeared at 60 Gy 69%, and that persisted at 60 Gy 33%. The local control rate and the tumor clearance rate of T1 glottic carcinoma were the highest among early laryngeal carcinoma, and those of T2 glottic carcinoma were the same as those of T1 supraglottic cases. The local control rate, the cause-specific survival rate, and the actuarial survival rate of T2 supraglottic were significantly lower than other cases.