Despite the growing body of research on creativity in team contexts, very few attempts have been made to explore the team-level antecedents and the mediating processes of team creative performance on the basis of a theoretical framework. To address this gap, drawing on Paulus and Dzindolet’s (2008) group creativity model, this study proposed team creative efficacy, transformational leadership, and risk-taking norms as antecedents of team creative performance and team proactivity as an intervening mechanism between these relationships. The results of team-level regression analyses conducted on the leaders and members of 103 Korean work teams showed that team creative efficacy and risk-taking norms were positively associated with team creative performance. Furthermore, the relationships between team creative efficacy and team creative performance and between risk-taking norms and team creative performance were mediated by team proactivity. These findings offer new insights regarding the antecedents and the mediator of creative performance in team contexts and important implications for theory and practice.