This study examines the relationshipbetween top management team (TMT) demographicheterogeneity (i.e., team diversity in terms of TMTinternational experience), firm performance (i.e.,ROA, ROE, and perceived performance), and themoderation effect of team members’ behavioralintegration among the relationships. Results fromsurveyed and public data of 112 chief executives inTaiwanese publicly listed firms revealed that TMTinternational experience heterogeneity was positivelyrelated to firm performance, and team members’behavioral integration positively and significantlymoderated the association between TMT internationalexperience heterogeneity and firm performance, suchthat the association is stronger when the degree ofteam behavior integration is higher than when thedegree is lower.