Abstract
The systems of the rental social security are from the point of view in the long-term period guarantee of the realization of the right to the adequate material security in old age. During the active economic life can person be in the situation, that there will be necessary to add also activities from more countries.
The aim of the contribution is to analyse the coordination of the social security in the European union countries with accent laid on the practical realization of the rental systems based on addition of insurance time and payment of allowances in foreign countries.