In the context of the growing importance of energy issues in international relations the author analyses the influence of there defined concept of energy security on foreign and national security policy of the Republic of Poland. The article deals with a new paradigm of energy security, in the framework of the creation of EuropeanEnergyPolicy.Basic features of the Polish energy sector are also presented, and foreign and national security initiatives on bilateral, regional and multilateral level,oriented to diversification of energy sources,suppliers and transport routes, aimed to guaranteea long-term economic,political and security stability are analysed.A comparison with the current energy situation in the Republic of Croatia is given fast approval of strategic energy documents is recommended in the conclusion of the article.