Organizational Citizenship Behaviors (OCBs) involves voluntary activities which do not form part of the organizational roles of workers and do not explicitly take into account the formal organizational compensation structure even though they improve the organization's general efficiency. To create a safer working environment and enhance job efficiency, education institutions must embrace and promote the OCBs. When workforce demonstrates OCBs actions, and they will increase their level of engagement and improve the performance of institutions. Such organizations would now be able to fulfil their objectives and better serve society. The purpose of the study to examine the impact of Transformational Leadership (TL) on organizational citizenship behaviours (OCBs), as well as the mediating role of job satisfaction (JS) in the Iraqi primary schools. Data collected from 172 teachers in some selected schools in Al Anbar Governorate through questioners and the data analysed by Smart PLS 3.2.9. The results indicated that Transformational leadership impacted teachers OCBs positively. Furthermore, Job satisfaction positively impacted OCBs and mediated between TL and OCBs. Implications the study emphasizes the importance of teachers OCBs and recommends that schools should encourage their mangers and administrative to exhibit more TL (Motivational, stimulating and creative actions). This study demonstrates the degree to which the internal motives of Teachers, particularly their Job satisfaction, lead to extra roles and affect OCBs-leaders from developing country prospects.