This thesis is based on the legal regulations of the maritime agency and the entities that make up the said activity. Using the legal regulations, the paper explains the way a maritime agency is formed. Furthermore, the activities of the maritime agent, his duties and responsibilities have been addressed in view of the general power of attorney given to him by the Maritime Agency Agreement. The Maritime Agency Agreement defines the relationship between the originator and the maritime agent, as well as the relationship between the maritime agent and third parties. As the Maritime Agency Agreement is an integral part of the Maritime Code, the legal provisions of the maritime agent's business are also addressed. Using the by-law and an autonomous source of law, the paper analyzes the general and special conditions of the maritime agency activity. Since it is not always possible to act in practice, case law has been introduced. Since joint association can be achieved more than individually, organizations that influence the work of the maritime agency are included in this analysis. Cooperation of maritime agencies with BIMCO, UNCTAD, FONASBA and its members ETASB-OM (operating at European Union level) and UPAH-OM (operating in the territory of the Republic of Croatia) enables networking and setting of rules of conduct of members for maritime agency activities.