The main purpose of this final paper is to show duties of directors in the the company business. In companies with dualistic structure required authorities are the Management board, Supervisory board (Monitoring Committee) and Assembly, while in the monistic structure are of the Management Board and Assembly. The management consists of one or more directors. As members of the Assembly there is a difference between CEOs who have the authority to conduct the affairs of society and non-executive directors who oversee their work. This paper analyzes the relationship between the Director and the operation of the Assembly, the duties and responsibilities of the Assembly members and termination of the membership. Managing directors and CEOs of the company perform functions which include planning, organizing, coordinating, directing and controlling the total resources of society.