The ports that can be found in the north Adriatic there are like a gateway to the world to all those Central European countries. In the 18th century, due to the then natural benefits, the ports of Rijeka and Trieste developed, which bore the epithets of important European ports. Such an epithet from fifty years ago within the ports of the North Adriatic bears the port of Koper. The favorable geo-traffic position of these ports and various institutional and political possibilities as well as restrictions have resulted in their current development trend. In today's conditions, the ports of Rijeka, Trieste and Koper are a kind of competitors because they are located on the same traffic route, but on the other hand their port system, which is unique, competes with other port routes, so they can work together to achieve better results. The aim of this thesis was to present the ports of the north Adriatic, and a more detailed analysis of their geo-traffic position, their traffic and terminals, as well as a review of their future further development.