Environmental noise raises serious problems in our ciries. Noise reduces the preformance task, and occasionially causes the physiological problems such as nervous strain, headache etc. This study is to investigate the environmental noise of elementary school classrooms in attempt to probide the basis of appropriate sound performance standards. Field interview survey with a total of 369 subjects in 3 elementary schools and simultaneously measurements of noise level have been made. The results of study show that the A-weighted noise level is in excess of the criteria recommended by I.S.O. and 69% of the subjects are annoyed by the environmental noises : in particular traffic ; and market noises.