Objective: Sleep deprivation is common among children and schools are ideal settings in which to influence children's sleep. Children spend a significant amount of time at school during key developmental periods, and programmes that influence students' well-being also benefit academic achievement. Comprehensive School Health (CSH) is an approach that prioritises school, home and community partnerships by supporting the development of health behaviours. However, sleep is often unaddressed in the school environment. The objective of this study was to integrate multiple partner perspectives to inform how to strengthen school-based sleep promotion using a CSH approach. Design: A secondary qualitative analysis of student aged 9-11 (n = 45), parent/guardian (n = 24) and teacher (n = 19) interviews from participants representing elementary (Kindergarten -Grade 6) schools and communities in Alberta, Canada was conducted. Data were examined using an a priori framework in alignment with the four components of the CSH approach: social and physical environment, teaching and learning, policy and partnerships and services. Inductive content analysis was used to develop categories followed by subthemes within each CSH component. Results: Subthemes identified within each component were as follows: social and physical environment (culture of healthy sleep habits; students influence each other); teaching and learning (formally integrate sleep-specific learning into curricula; school, teacher and parents/guardian collaboration); policy (sleep-positive classroom policies) and partnerships and services (community partnerships; school-home collaboration). Conclusion: This research identifies recommendations from student, parent/guardian and teacher interviews to inform and strengthen school-based sleep promotion when taking a CSH approach. Findings can support school partner efforts to foster a school culture (or ethos) of healthy sleep habits leading to improvements in student sleep behaviours.