Sub-chapter deals with the reservation of public policy which serves to protect fundamental social values as morality, freedom, justice or decency. Initially analyses the concept of public policy contained in international conventions. There are listed some examples of the international conventions on the applicable law or the recognition and enforcement of judgments. The following part discusses the reservation of public policy in the EU law. It states the examples of regulations which contain the provisions relating to public policy and further analyses the provisions of the Rome I Regulation and Rome II Regulation. The last part deals with the reservation of public policy regulated by the Private International Law Act.