In this study, using the 9th-year high school 3rd-grade student data of the 4th-grade elementary school panel of the Gyeonggi Education Longitudinal Study collected in 2020, how attachment-trust relationships with parents affect academic stress through growth mindset and learning motivation as a medium was examined. To achieve this, an analysis using structural equation modeling was conducted, and the results were as follows. First, the higher the degree of attachment-trust relationship with parents, the higher a child's growth mindset and intrinsic motivation; however, this was observed with lower levels of amotivation, extrinsic motivation, and academic stress. Second, it was found that growth mindset increased students' intrinsic motivation while decreasing amotivation, extrinsic motivation, and academic stress. Third, learning motivation increased academic stress regardless of motivation type, and the effect on academic stress was found to be significant in the order of extrinsic motivation > intrinsic motivation > amotivation. Fourth, in the relationship between attachment-trust relationship with parents and academic stress, the mediating effect according to growth mindset and type of learning motivation was confirmed. These results suggest that efforts to enhance growth mindset based on the attachment-trust relationship between parents and their children are necessary to reduce academic stress.