This book with the title Internal Communication Organization created by Aselina Endang Trihastuti. Good internal communication is one of the characteristics of professionals who want to get a credible predicate. Organizations should involve internal stakeholders both individually and in groups inter divisions to manage the flow of internal communication from superiors to subordinates and vice versa (upward and downward); and maintaining the organizational climate in accordance with the organizational culture that is instilled. Internal communication requires harmonious human relations to build solid employee relations. Last but not least, the achievement of organizational goals depends on the type of leadership in providing support, motivation and practicing effective open communication.