This study aims to examine the moderating role of math anxiety in the effect of the attitude towards school on the students' happiness. In the semester of 2021-2022, 415 students at the 8th grade of secondary schools, participated in the study. In this study a correlational survey model was employed. "Scale for Attitude Towards School", "Math Anxiety Scale", and "Adolescent Happiness Scale" were used to collect data. In the analysis of data, SPSS Process Macro extension was utilized. This study reveals that attitude towards school positively affects students' happiness while math anxiety negatively affects students' happiness. Furthermore, the study demonstrates that math anxiety has an effect that could decrease the effects of attitude towards school on students' happiness. Therefore, it was determined that there is a moderating role of math anxiety in the effect of the attitude towards school on the students' happiness.