Organization citizenship behavior (OCB) is relatively new concept considered under Organizational Behavior. The reason for choosing OCB as a research ground is its positive relationship with unit performance. Research has shown that OCB helps maximize the organizational performance of companies (Podsakoff et al., 2000). Since this is the goal of every organization, it benefits managers to understand how various variables affect OCB. This understanding can help managers assess what kind of environment to provide their employees, and also what motivates and satisfies them. Nowadays, most of researching in the field of OB held in the geographical context of western culture. As Vietnam particularly and Asia in general are different from the rest of the world, if culture is made the origin of segregation, Gautam et al. (2006) argues that OCB may vary, with change in geographic context; OCB is enacted differently in differently cultural contexts. In Vietnam, many western multinational companies are moving in this region because of cheap labor and immense potential market, so this study would principally be targeted to help in a better understanding of the OCB in a different geographical context.