This study aims to clarify the effects of the environmental education system focusing on the knowledge and attitude in relation to environmental education to the students in the middle school. The study is accomplished by the survey which includes a total of 923 enquiry lists sampled from two groups of the middle school one of which composing of four(4) middle schools having the environmental curriculum, hereafter referred as "the case group" and the other group of four(4) middle school without the curriculum, hereafter referred as the "the control group". The survey took for 15 days from the date of 15th March 1996 to 30th March 1996 and the results were as follows; 1. The score on the case group was higher than control group. There was no statistically difference of the score by gender. 2. Environmental knowledge devided 5 categories, most of the score on the case group was higher than control group. Especially, there was statistically significant difference of three categories; pollution, population and civillization, energy. 3. The score of male on the category of energy was higher than female. 4. The attitude related to environment, the score on the case group was higher than control group and the difference was statistically significant. 5. As for the environmental attitude, devided 4 categories, the score of conservation on the case group was higher than control group. 6. Most of the score of the female on the environmental attitude was higher than male. Especially, there was statistically significant difference of three categories; pollution, conservation, economize in energy.