Theoretic and empirical studies suggest that affect at work is an important component of job attitudes and an important predictor of employee behaviors. This study extended previous research and focused on the relationships between positive affectivity and employee behaviors. Furthermore, this study examined the moderating effects of the perceived organizational support on the relationship of affect. Results from 208 employees of 15 films supported the hypotheses and showed that positive affectivity was significantly positive related to helping behavior and negative related to withdrawal behavior. In addition, employees with high positive affectivity exhibited the more helping behavior and the less withdrawal behavior when they perceived higher organizational support