Researchers have displayed considerable interest in how and when team cognitive diversity leads to improved or impaired team innovation. When addressing this issue, scholars have adopted the information/decision making and social categorization theoretical perspectives. In contrast, we draw on conservation of resources (COR) theory when examining the cognitive diversity and team innovation relationship. We argue that in a team environment, cognitive diversity may result in the threat of losing valuable resources. This threat, in turn, encourages team members to engage in resource replenishment through the use of different humor styles (i.e., affiliative, self-enhancing, aggressive, self-defeating). We argue that, with such resource replenishment, four team-level humor styles emerge and mediate the relationship between cognitive diversity and team innovation. In addition, we expect team emotional intelligence to moderate the relationships between cognitive diversity and team humor styles. Our model has important theoretical implications for team diversity, humor, emotional intelligence, and innovation research. Plain language summary: Team cognitive diversity can be defined as the extent to which team members differ in their ideas, perspectives, or values. Cognitive diversity is important for teams to cultivate innovation although it may also result in relationship conflicts and the formation of subgroups in a team. Our paper views cognitive diversity as a signal that drives team members to use humor to cope with diversity. This may then result in different humor styles (i.e., affiliative, self-enhancing, aggressive, self-defeating) that characterize the way the team uses humor. For instance, while working in a cognitively diverse team, team members might make a joke about work that the whole team laughs together (i.e., affiliative humor). However, some members might use sarcasm to insult others who are different from the group norms (i.e., aggressive humor). We argue that the team humor styles will influence team innovation, which in turn will link cognitive diversity with team innovation. Moreover, we suggest that team emotional intelligence will influence the extent to which the four team humor styles link cognitive diversity and team innovation.