Diversity and Humor were the keys to affect on creativity. Existing research has revealed inconsistent conclusions about the relationship between team diversity and team creativity. Given this context we set out to explore how team humor moderated the relationship between team diversity and team creativity. Paired responses were collected from teams in advertising agencies. The participants in this study were 75 teams in advertising agencies. The advertising sector was chosen given the importance of creativity to their work. Data analysis was carried out by confirmatory factor analysis and hierarchical regression analysis. The findings show that team humor moderate the relationship between task-related diversity and team creativity while the moderating effect of team humor on the bio-demographic-team creativity was not verified. This paper goes on to discuss our overall findings, arrive at related managerial implications and propose directions for further research.