rganizational Citizenship Behaviour (OCB) has been explored and researched by scholars for more than twenty five years and it continues to be an area of interest for scholars. OCB refers to the voluntary behaviour/s exhibited by the teacher Educators, while in the organization, as good citizens of the organization. This paper attempts to study the impact of organisational citizenship behaviour on knowledge Management for teacher educators affiliated to Mumbai University. The paper aims to obtain greater understanding of the impact of organisational citizenship behaviour on Knowledge Management of Teacher Educators of B.Ed colleges. This paper shows that there is a significant positive relationship between Organizational citizenship Behaviour and Knowledge Management. If organizational citizenship Behaviour increases, there is significant increase in the overall Knowledge Management.