In this meta-analysis the effect of school climate considered as an academic achievement was tested. In the literature review, 153 studies were found and 62 of them were included in this meta-analysis. With this study, 62 studies, independent from each other, were brought together and 81.233 study subjects were included in the sample group. The results of the analyses performed with random effects model revealed that school climate has a moderate effect on students’ academic achievement. It was found that only the year of publication was a moderator variable from all the moderators of lesson, sample group, type of publication and year of publication. According to the results obtained from this study, school climate is a significant variable for academic achievement