Organization, as well as organizational structure, represents a very important element of every company which enables to achieve the set goals and implement certain company strategies for the purpose of successful business. The influence of internal and external factors is particularly important for the process of forming organizational structure. The internal factors are mutually connected and any alternation in one of the factors leads to the alternation in another factor. Contrary to internal factors, which a company defines and can act on, the external factors are environmental factors that cannot be influenced by the company, but must be adapted to them. The more favorable and better the factors are, it will be the more efficient the goals of the organizational structure. Based on the analysis of the organizational structure of Privredna banka Zagreb d.d. it can be concluded that this is an example of a very well organized company with precisely defined responsibility and division of business, and a well-developed management, information and control system. Tasks are specialized by sectors and organizational units with numerous functions. The Bank's organizational structure is adequate for adapting to possible changes and challenges in the business environment, technological trends, and enables it to compete in the market and achieve its set goals in the future.