Financial intermediaries are an essential element of any financial system and because of that they enjoy an enviable position in it. They try to achieve their role by satisfying the needs of their clients, but also by satisfying their own personal needs. Also, the intermediaries’ main tasks are being accomplished with constant supervision of entrusted body. There are several types of financial intermediaries operating in the Croatian financial system; depository institutions, contractual savings and investment intermediaries. The main reason of their existence and activities is the realization of yield or earnings. This work focuses on analyzing certain types of intermediaries and determining various circumstances that influence their work. Also, the focus is on displaying interactions and connections between different intermediaries. This work is divided into several sections. The subject of this paper and its objectives are defined in the introductory part. Also, in this section readers will be introduced with the very subject of the work. The second section is designed to display and describe the financial system. The focus of this paper, financial intermediaries, will be presented in the third section. The fourth unit deals with the supervisory authorities of financial intermediaries. Analysis of the banking sector, pension funds, investment funds and insurance companies is the main issue of the fifth complex. The conclusion presents the summary of all that has been mentioned during this work.