The main core of this paper is to emphasize the importance of regional policy and the Common Agricultural Policy of the European Union. Regional policy is the major investment instrument of the EU and its main goal is to achieve more balanced development between the EU member states, i.e. between developed and less developed regions. We can say that regional policy is the expression of solidarity among EU countries because it is directed towards investments in less developed regions. Its purpose is to encourage regional development and to reduce social and economic differences between that region. The creations of the European Regional Development Fund started in 1975. The reason for creating this regional policy was the increasing number of poor members of EU. The efforts of regional policy are focused on convergence, cooperation and competition. By becoming a member of the EU, Republic of Croatia has the rights to use the resources of the Structural Funds as well as the Cohesion Fund. The problems of each region as well as the region in Croatia can be solved by quality exploitation of the help that's provided by the European Union through regional policy. The Common Agricultural Policy (CAP) aims at improving agricultural productivity, protecting farmers' income and supplying food to consumers. It was founded in 1962 as a prevention in the post-war period when the problem of lack of food appeared. CAP financing is made through two funds: the European Agricultural Guarantee Fund and the European Agricultural Fund for Rural Development. By becoming a member of EU, Republic of Croatia has the right to use the resources from these funds to develop and strengthen the region within the country and to compete among other members of the Union.