This chapter explores the crucial interplay between organisational communication and behaviour. Effective communication within an organisation is essential for its success, facilitating information exchange and fostering positive relationships among stakeholders. The chapter examines how organisational communication, encompassing various channels and styles, influences employee behaviour, contributes to a positive organisational culture, and ultimately drives organisational effectiveness. Furthermore, it explores the role of leadership in shaping communication patterns and fostering employee engagement. By understanding the dynamics of communication within an organisation, leaders can create a more inclusive and productive work environment, leading to improved employee satisfaction, enhanced performance, and, ultimately, organisational success.