Introduction: Academic engagement is one of the indicators of academic quality. The purpose of this study was to structural equation modeling of students' academic engagement based on academic help-seeking, transformational teaching, perceived social support with the mediation role of academic buoyancy. Method: The statistical population was all undergraduate students of Esfarayen University of Technology, in 2016-2017 academic year. The sample included 304 students (253 boys, 51 girls) who were selected using random cluster sampling. Academic engagement scale (Fredericks et al., 2004), academic buoyancy (HosseinChari and Dehghanizadeh, 2012), Help-Seeking (Ryan and Pintrich, 1997), perceived social support (Zimet et al., 1988) and Transformational teaching (Beauchamp et al., 2010) were used to measure variables. Results: Perceived social support, academic help-seeking and transformational teaching had a direct effect on academic engagement. Also, Academic help-seeking, transformational teaching and perceived social support had indirect effects through academic buoyancy on academic engagement. Academic buoyancy could predict the student academic engagement positively. Overall, finding suggested that academic buoyancy had a mediating role in the relationship between academic help-seeking, transformational teaching, perceived social support and academic engagement. In total, the variables of the research were able to predict about %31 of the variance of academic engagement. Conclusion: By enhancing help-seeking, social support and teachers' use of transformational teaching, students helps them overcome their educational problems, and increase their academic buoyancy. These factors can enhance students' academic engagement to interact with each other.