This study aims to examine problems of marketing business operated by fisheries cooperatives and provide some suggestions for enhancing their marketing business function. It reveals that although sales business function of fisheries cooperatives is very important for the members of Korean fisheries cooperatives, their performance and efficiency outcomes have been disappointing. The research offers four suggestions for resolving the issues. First, it is needed to establish logistics centers in urban areas. Second, it is also desirable for the cooperatives to develop functional and nutritional aspects of fisheries products. Third, joint marketings among primary cooperatives are necessary. Finally, human resource development programs are needed.