Introduction: Unhealthy sleep pattern is prevalent among young people in both the West and the East and hampers their physical and mental well-being. Guided by Fishbein and Ajzen’s reasoned action approach (2010), this study aims to investigate the psychosocial influences on healthy sleep pattern among college students in Macao, China. Method: A questionnaire survey was conducted with a convenience sampling at the campus of a local university. In total, 362 college students aged 18-25, without serious sleep or emotional disturbance, were successfully recruited with their informed consent and completed the study measures. Results: The results of correlation and regression analyses showed that intention toward healthy sleep and perceived behavioural control significantly explained the variance on college students’ healthy sleep pattern. Moreover, attitudes, subjective norms, and parental nurturance exerted indirect, positive effects on sleep pattern, via promoting intention and/or perceived control. Conclusion: The present findings suggest that positive attitudes toward healthy sleep, favourable social norms, high perceived behavioural control, as well as high parental nurturance are protective factors against unhealthy sleep among Chinese college students. In particular, they highlight the importance of the influences of significant others like parents on young people’s healthy sleep, and provide practical insights on how to promote healthy sleep pattern by school-based interventions.