Abstract: Twenty-eight bred restored lines and four standard checks were screening for resistance to blast disease of rice during the T. aman and boro season. The breakout and severity of per cent leaf area diseased were recorded under natural infection. On the basis of disease intensity, three were highly resistant, 12 resistant, 16 were moderately resistant and 1 was moderately susceptible at T. aman season and at boro season 3 line s were found to be highly resistant, 8 resistant, 17 moderately resistant and 4 were moderately susceptible. Wide range of variation was observed regarding resistance among the entries. Variations were also found on the basis of season. Considering both seasons, the accession numbers 56, 57, 64, 66, 71 and 73 showed comparatively better performance against above mentioned rice disease.