A company increases profits every year in order to keep reaching a larger target. It can be reached if each employee is having an Organizational Citizenship Behavior (OCB). The aims of this study are to measure and analyze the influence of job satisfaction, Perceived Organizational Support (POS), and organizational climate through OCB of the employee on employees in an outsourcing company Jakarta. The population of this study was all employees in the outsourcing company, which were 72 respondents. The sampling technique used in this study was saturated sampling with all employees for the object. This study used a linear regression method to analyze data. The finding of this study was job satisfaction, POS, and organizational climate variables have significant correlations to OCB. This study also showed the most variable that influencing OCB was job satisfaction.