Organizational citizenship behaviour is an important factor that “aggregate promotes the effective functioning of the organization” (Organ, 1988). And the job satisfaction is defined to be “a pleasurable or positive emotional state resulting from the appraisal of one’s job or job experiences” (Locke, 1976). Researches have been done to measure the relationship between the job satisfaction and organizational citizenship behaviours. Some results show there are relationship between job satisfaction and organizational citizenship behaviours while some argue there are little relationship between this two factors. The aim of this paper is to find out the relationship between job satisfaction and organizational citizenship behaviours and measure whether other factors such as age and service length by using the questionnaire to collect data. Introduction In recent years a number of studies have expanded the understanding of organizational citizenship behaviour within the workplace. Organizational citizenship behaviour refers to individual behaviours that are “discretionary, not directly or explicitly recognized by the formal reward system, and that in the aggregate promotes the effective functioning of the organization”(Organ, 1988). In the early 1980s, the term “organizational citizenship behaviors” was created to depict extra-role those behaviors previously described by Katz (Smith et al., 1983). Katz maintained that organizational citizenship behaviors are “vital to organizational survival and effectiveness.” He also provided several examples of important extra-role behaviors, among them are actions that protect the organization and its property, constructive suggestions for improving the organization, self-training for additional responsibility, creating a favorable climate for the organization in its surrounding environments, and cooperative activities (Katz, 1964). Katz and Kahn (1966) suggested that organizational citizenship behaviors were spontaneous and innovative. Moorman and Blakely (1995) pointed out that organizational citizenship behaviours were beneficial and desirable from an organizational perspective, however, the behaviours were difficult to be increased through contractual arrangements or formal rewards. Bolon (1997) emphasized that organizational citizenship behaviours were not enforceable requirements of the role or the job descriptions, which were the clearly specifiable terms of the person’s employment contract with the organization. The behaviors were matters of personal choices. The omission was not generally understood as punishable. Organ (1990) pointed out that the definition did not necessarily imply that organizational citizenship behaviours were limited only to those behaviours, which were lacking in tangible return to the person who performs such behaviours. He also maintained that a continual demonstration of organizational citizenship behaviours over time may influence the impression of coworkers or supervisors who develop concerning a particular employee. The impression could play an important role in future reward considerations, such as a salary increase or a promotion. Organizational citizenship behaviours have been linked to many work-related factors, for example, it has been associated with organizational commitment (Bolon, 1997), and transformational leader behaviours (Podsakoff et al., 1990). Studies have found that organizational citizenship behaviour is associated with job satisfaction (eg. Bolon, 1997). Job satisfaction has been gaining steady attention. Job satisfaction could be defined as “a pleasurable or positive emotional state resulting from the appraisal of one’s job or job experiences” (Locke, 1976). The term job satisfaction was first coined by Hoppock in 1935. He defined it as the satisfactory feeling on both psychological and physical sides of the employees about the working conditions. It is the subjective responses of subordinates to work situations. Porter (1973) suggested that the extent of job satisfaction was the difference between the one who “really acquires” from work and the one who believed that he “should acquire” from work. A common view among managers is that satisfied employees were more productive than dissatisfied employees. Robbins (2001) suggested that job satisfaction was not only a general attitude toward one’s job, but also the differences between the amount of reward workers received and the amount they believe they should receive. In addition, he presented that the term of job satisfaction refers to an individual’s general attitude toward his or her job. A person with a high level of job satisfaction holds positive attitudes toward the job, while a person who is dissatisfied with his or her job holds negative attitudes about the job. As a psychological need and a factor to well being, job satisfaction is believed to have an environmental and genetic component (Arvey et al., 1989). There are several different variables, which are related to job satisfaction, such as cultural values, transformational leader behaviours and organizational commitment (Kirkman and Shapiro, 2001; Podsakoff et al., 1990; Feather and Rauter, 2004). There has increasing attention to the possible relationship between job satisfaction and organizational citizenship behaviour. Transformational leaders are those who ‘broaden and elevate the interests of their followers, generate awareness and commitment of individuals to the purpose and mission of the group, and … they enable subordinates to transcend their own self-interests for the betterment of the group’ (Seltzer et al., 1989). Transformational leadership is one of the groups of models describing leadership as an influencing social interaction or process. The process refers to one or a group of individuals which influence the behaviour of other people in an organizational setting for the purpose of achieving or accomplishing organizational objectives (Yukl, 2002). Transformational leadership behaviours raise the consciousness of followers about what is important, move followers to transcend the self-interest for the good of the organization, and raise their concerns for higher level needs on Maslow’s h>