Communication skills are one of basic skills of manager. External managerial communication are the contacts manager has with employees, business partners, customers, suppliers and wider social community. Internal managerial communication is a collection of various communication processes between managers. Various obstacles and interruptions can cause a reduction in communication. The perfect communication is mostly unattainable. Good organizational behavior techniques will bring the manager success in business and management. Successful performance of management functions is the result of successful communication. Communication is the process of sharing information essential to the modern managment. It is a vital part of all management functions – planning, organizing, human resources, leading and controlling. Lack of communication, excessive networking, globalization, the development of highly sophisticated technology, Internet and turbulent economical enviroment are factors that decide the quality of management. Modern manager uses communication as his most important activity. He directs, coordinates, develops cooperation, teamwork and partnership with employees to achieve the objectives of a particular task. The achievements and the results show the effectiveness and completeness of management.