The current article aims to explore the relationship between organizational culture and teachers’ organizational citizenship behaviour. Organizational culture represents one of the important components of the efficiency of educational institutions. Studies demonstrate the close relationship between organizational culture and other components such as job satisfaction, performance, productivity and efficiency and others. Traditionally, organizational culture performs several functions: the integration of employees within the institution, the direction of employees in order to achieve the objectives of the institution, the protection of employees against potential environmental threats, the preservation and transmission of the values and traditions of the institution, ensuring the strengthening of the performance of employees and the institution. In the context of our research, we propose to establish the connection of organizational culture and teachers’ organizational citizenship behaviour. Organizational citizenship behaviour (OCB), which is an element of organizational culture, is defined as behaviour individuals exhibit at their own discretion, which is not directly apparent to or recognized by the organization’s official reward system. OSB includes the following components: helping behaviour, sportsmanship, organizational loyalty, organizational compliance, personal initiative, civic virtue, and personal development (Podsakoff et. el., 2000). The research methodology is based on the Teachers' OCB profile developed by H.Balalis. At the same time, this research uses a literature review. The results are described narratively. Based on Organizational culture concept (according to Schein; Robbins and others) and considering OCB (according to Batman and Organ), we suppose a positive and significant relationship between both concepts. Research questions: What is the relationship between Organizational culture and OCB at school level? The main findings: teachers' OCB dimensions have a positive interconnection with the school's organizational culture. OCB and the school's organizational culture are in an interdependent relationship and condition each other.