An inter-organizational team, which consists of diverse members from different organizations to conduct an initiative, has been widely treated as a critical method to improve organizational innovation. This study proposes a multilevel model to test the relationship between shared leadership and creativity at both team- and individual level in the context of inter-organizational teams. Multisource data were collected from 53 inter-organizational teams. We obtain the following findings: first, shared leadership is positively related to both team creativity and individual creativity via knowledge sharing. Second, task interdependence positively moderates the relationship between shared leadership and knowledge sharing. Third, task interdependence positively moderates the relationship between knowledge sharing and team creativity, but does not moderate the relationship between knowledge sharing and individual creativity. We discuss the theoretical and practical implications of the findings.