Ample evidence for a positive relationship between team efficacy and performance in nonmanagerial teams exists (Gully et al., 2002), but the team efficacy–performance relationship in management teams is an important finding. Despite the importance of team efficacy for organizational performance (Bandura, 1997; Yun, 1999), no prior research has assessed this relationship in management teams, to the best of our knowledge. Our results do not support Gibson’s (1999) finding of no relationship between team efficacy and performance in teams performing tasks high in uncertainty (e.g., management teams). Although this does not imply that task uncertainty is a less important moderator of the team efficacy–performance relationship, what seems more likely is that other factors (e.g., team interdependence) in the case of management teams might compensate for the effect of task uncertainty (Gully et al., 2002). Identifying the boundary conditions of the team efficacy–performance relationship remains an important area for future research (Mischel & Northcraft, 1997).