This study develops a moderated mediation model that explores the link between empowering leadership and older teachers' knowledge-sharing behaviour by focusing on the mediating role of organization-based self-esteem and the moderating role of organizational status. Based on a two-wave survey of 204 older teachers in primary and secondary schools in China, the results indicate that principals' empowering leadership is positively related to older teachers' knowledge-sharing behaviour, and this relationship is mediated by organization-based self-esteem. Moreover, organizational status moderates the mediating role of organization-based self-esteem in transmitting the effect of empowering leadership to knowledge-sharing behaviour.