The paper aims to clarify the influences of collaborative cu lture and specific aspects of organizational learning on competitive advantage. Structural equations modeling (SEM) is applied to test degree of influence of each variable has on each other through using data collected fro m 298 participants at 150 large manufacturing and service firms. The result shows that organizational learning act as mediat ing ro les in the relationship between collaborative cu lture and competitive advantage. Our results indicate that collaborative culture practices will y ield significant effects to competitive advantage directly or indirect ly through imp roving specifics aspects of organizational learning. The findings of this study provide a theoretical basis, which can be used to analyze relat ionships between collaborative culture, specifics aspects of organizat ional learning and co mpetitive advantage. Fro m a pract ical perspective, the study brings more deeply understanding for CEOs/ managers about the necessary factors to encourage and promote firm"s competitive advantage.Keywords: organizational culture, co llaborative cu lture, organizat ional learning, differentiat ion competit ive advantage, cost competitive advantage, SEM