Organizational or corporate culture is closely related to a company's business organization. The efficiency of the organization is ensured by the proper maintenance of the organizational culture. Also, successful human capital management as the most important resource of a business organization finds its foundations in the established organizational culture. Namely, the culture of the organization is different in each company, and the difference stems from the elements of organizational culture. These are: values, norms, attitudes, beliefs, rituals and customs. The paper also describes the model of organizational culture. Decision making and the way decisions are made in an organization are related to the types of organizational culture. The type of organizational culture is formed with respect to organizational culture and has a great influence in the decision- making process. Furthermore, the paper presents group decision- making, the importance of team decision- making as well as the advantages and disadvantages of such decision- making. Also, the paper gives an example of group decision making in marketing decision making, the importance of accounting information. Today, the influences of globalization and tehnology development have led to the development of modern types of organizations that nurture teamwork and group decision making.