A concession in the legal sense is a license to perform an activity that is subject to a special approval. A concession is also a legal bilateral relationship and always develops between the two parties, between the grantor of the concession and the concesssionaire. There are some types of concessions, such as concessions for the economic use of common ot other goods, concesions for works and concessions for services. This paper will mention many other things related to the concession, such as the chararacteristics of the conseccion, the development oft he concession, concession agreements and will give an example of a concession. In order to establish a concession relationship, it is necesarry, in addition to the decision on the concession, to enter into a concession agreement which determines the rights and obligations of the grantor and the concessionaire. The concession grantor is obliged to continuosly monitor the work of the concessionaire and the execution of its obligations under the concession agreement. In the Republic of Croatia, in addition to the Concessions Act, other regulations apply, such as the Maritime Property and Seaports Act