Background and Purpose: Academic Engagement can be influenced by a number of factors, including the basic psychological needs and school cultural needs of the school. The purpose of this study was to investigate the mediating role of basic psychological needs in the relationship between school culture and academic engagement of students. Method: The present study was a correlation with structural equation model. The statistical population included all male students in Ghaen secondary school in the academic year of 2018-2019. 380 people were selected using cluster sampling method. The research tools were Alessandro and Sad School of Culture Questionnaire (1997), Salmala-Arrow and Opadaya (2012), and Scales of the Basic Psychological Needs of Collaborators (2000). Pearson correlation tests and analysis of structural equations with Spss software version 24 and Amos version 24 at a significance level of α = 0.05, were used to analyze and analyze the data. Results: According to the results, school culture had a direct and significant effect on basic psychological needs (β=0.803, P<0.01) and academic engagement (β=0.477, P<0.01). Psychological needs also had a direct and significant effect on academic engagement (β=0.292, P<0.01). It is concluded that the school culture has an indirect effect on students' academic engagement through the mediating variable of basic psychological needs (β=0.234, P<0.01). Conclusion: Based on the results of this study, it can be said that the basic psychological needs and school culture, increase academic engagement. Basic psychological needs also increase the relationship between school culture and academic engagement.