OCB is associated with job satisfaction, in accordance with the findings of Murphy, Athanasou,& King (2002), Miao (2011), and Mehboob & Bhutto (2012). The relation is more intense in the public sector than in the private one. Our results, therefore, suggest that satisfaction is a weak predictor of OCB, according to Mehboob and Bhutto (2012), and contrary to the results obtained by Organ (1988).