The Eastern enlargement of the European Union has substantial influence on EU external policy and its relations with non-EU countries, including Russia. In this situation, Russia's main concern is to avoid the creation of new dividing lines after the enlargement. This paper will argue that instead of dividing Europe, the EU enlargement would create a framework for further cooperation and eventually rapprochement between the EU and Russia. Therefore, Russia would be able to benefit from this process. The paper will analyse the consequences of the EU enlargement for Russia and examine the main political concepts determining directions of this rapprochement between the European Union and Russia: New Neighbourhood, Common Spaces and Eastern dimension.