The present study investigates the mediating role of perceived organizational support on the relationship between leadership styles (paternalistic, participative and authoritarian leadership) and organizational variables (affective commitment and intention to leave). Participants are 341 (143 women and 198 men) white-collar employees. Analysis of data indicated that perceived organizational support fully mediates the relationship between authoritarian leadership and affective commitment. But perceived organizational support partially mediates the relationship between paternalistic, participative leadership and affective commitment. Moreover the relationship between paternalistic leadership and intention to leave is fully mediated by perceived organizational support. But perceived organizational support partially mediates the relationship between authoritarian, participative leadership and intention to leave.