Student-athletes are especially at risk of mental health impairment because of the demands of both the academic and athletic context. However, there is a lack of studies focusing on the impact of specific dual career factors on their mental health due to a lack of measurement tools designed to examine the interactions between student and athlete roles. The purpose of this study was to develop the Sport-School Interactions Scale in a long (SSIS-LF) and a short form (SSIS-SF) from existing work-family and school-family conflict and enrichment scales (Carlson et al., 2000; Carlson et al., 2006; van Rhijn et al., 2019). Factorial structure, discriminant validity, and reliability were examined and showed acceptable evidence in Study 1 (CFA goodness of fit : n = 371, χ² (528) = 1222.41, p < .001, CFI = .92, SRMR = .05, RMSEA = .06; McDonald’s omega coefficients ranged from .80 to .93) and Study 2 (n = 367, χ² (47) = 126.27, p < .001, CFI = .93, SRMR = .06, RMSEA = .07; McDonald’s omega coefficients ranged from .63 to .76). Moreover, concurrent validity was evidenced through the relationships between sport-school interactions and role-specific perceived stress and satisfaction, and global well-being.