This study aims to determine the relationship between knowledge and attitudes and skills in managing a clean school environment for state junior high school students in Bangkinang District, Kampar Regency. This research is a quantitative research with a survey method approach. Data collection methods used were tests, observations, interviews, questionnaires and documentation. Data analysis uses a simple correlation test with the Person Correlation method. The results showed a positive relationship with a moderate level of closeness between environmental knowledge and the attitude of managing a clean school environment of SMP Negeri 1 Bangkinang Kota students with a significant value of 0,000 <0.005 and a correlation coefficient of 1,000, at SMP Negeri 2 Bangkinang Kota students there was a positive relationship with a moderate level of closeness between environmental knowledge and attitudes with a significant value of 0,000 <0.005 and a correlation coefficient of 0.404. There is no relationship of knowledge with skills to manage a clean school environment students of SMP Negeri 1 Bangkinang kota with a significant value of 0.069> 0.05 and a correlation coefficient of 0.135, but at SMP Negeri 2 Bangkinang Kota students there is a positive relationship with the moderate level of closeness between environmental knowledge with the skill to manage a clean environment with a significant value of 0,000 <0.005 and a correlation coefficient of 0.432. There is no relationship between attitude and skills in managing a clean school environment of SMP Negeri 1 Bangkinang Kota students with a significant value of 0.069> 0.05 and a correlation coefficient of 0.135, but at SMP Negeri 2 Bangkinang Kota students there is a positive relationship with the moderate level of closeness between attitude and skills to manage a clean school environment with a significant value of 0,000 <0.005 and a correlation coefficient of 0.660.