EN
Presence of organizations called interest groups in the European Economic Community was becoming more and more pronounced along with progress in integration processes. The author's attention is focussed on one of categories of groups and namely on interest groups of socio-economic character set lip to pursue interests of economic subjects associated in organizational structures (e. g. agricultural producers, industrial producers, hired labour). Even a superficial analysis of the phenomenon confirms great potential importance of these groups for the integration process. Creation of the EEC and transfer of competences in the field of economic policy in favour of different institutions of the Common Market led to gigantic growth of interest revealed by national economic interests groups wishing now to transfer their operations to the level of the EEC. This interest and a need for co-ordinatioh of activities of national groups paved the way for rapid creation of the groups at the EEC level. Analysis of genesis and process of creation of international economic interest groups points at strong relationship between the integration process and creation of international structures replacing earlier national economic interest groups. Stucture and internal organization of groups at the Common Market level is a function of tasks which are to be performed by these organisms on behalf of subjects grouped within them in relation to institutional superstructure of the European Economic Community.