The success and sustainability of an organization is largely determined by the willingness of organizational members to behave well not only when carrying out their main tasks, but also extra behavior in wanting to be good teachers. However, there are indications that teachers at the PGRI Vocational School, Bogor Regency, only carry out basic tasks and do not demonstrate behavior that supports organizational effectiveness outside of this. The aim of this research is to determine the relationship between Transformational Leadership and Self-Efficacy on Organizational Citizenship Behavior both partially and jointly. The population in this study were teachers at the PGRI Vocational School, Bogor Regency with a sample of 243 respondents. Data collection was carried out by distributing questionnaires and data processing was carried out using simple regression analysis and multiple regression analysis. The research results show that (1) Transformational Leadership has a positive and significant relationship with teachers' Organizational Citizenship Behavior. (2) Self-Efficacy has a positive relationship with teacher Organizational Citizenship Behavior. (3) Transformational Leadership and Self- Efficacy together have a positive and significant relationship with teachers' Organizational Citizenship Behavior.