Team innovation requires idea generating and idea implementing. In two studies, we examine how these two team activities are affected by the extent to which members value traditionalismthat is, placing importance on preserving old ways of doing things over breaking precedent and forging new approaches. We proposed that higher average levels of team traditionalism would be negatively associated with idea generating (i.e., given that preserving the old may run contrary to new ideas) but positively associated with idea implementing (i.e., because implementing requires agreement about feasibility of a limited set of ideas and applying them). Conversely, we proposed the exact opposite effects for diversity on team traditionalism (i.e., negatively associated with idea generating and positively associated with idea implementing). Further, we argued that these effects would be mediated by team process conflict because diversity on team traditionalism might make it more likely that members will debate what to retain versus newly adopt; and, team agreement is more likely to occur when team members' values are shared, rather than discrepant, with one another. Supporting our theoretical assertions, we found that whether traditionalism is an asset or liability for team innovation depends on whether: (1) the average level of, or diversity on, team traditionalism is examined; and, (2) idea generating versus idea implementing is of primary importance. Specifically, idea generating benefits the most from higher diversity on team traditionalism, whereas idea implementing benefits the most from higher average levels of team traditionalism. We discuss theoretical and practical implications.