This Master thesis elaborates the conceptual design of the communal port in the Rijeka's port basin, which is located in the complex of the port of Rijeka near Orlando's pier. The introductory part of the thesis contains the development of nautical tourism in the city of Rijeka and the Gulf of Rijeka. The current condition of the port of Rijeka, development plans of the area and spatial planning documentation of the port of Rijeka are also described. The diploma thesis thoroughly describes the history of the port of Rijeka as well as data on the current state of maritime structures in the port and the description of wave behavior in the basin of the port of Rijeka. After that, the calculation methodology was elaborated in detail, which includes a separate topic of dimensioning pontoon piers and a description of the calculation of berth layouts in the port. In addition to the preliminary solution of the disposition of berths in the port, the calculation of the anchoring system of floating piers and the description of the wave agitation for the port construction area follow. In the integral part of the paper there are also graphic attachments that contain situational representations of three variants. The profitability of such investment projects is also shown in the end of Master thesis, and the main characteristics by which they differ are shown. Final part of the thesis consists of conclusion and author’s opinion on the conceptual design of the communal port.