The article is about transatlantic cooperation between Poland and US for energy security. Energy sector is dependent on government strategy. Policy should crate protection for society and business. Global energy consumption is still growing. Developing industry especially needs natural resources to produce energy. The climate is changing and global warming is said to cause greenhouse eff ect resulting in droughts or floods. The major energy sources consumed in the United States are petroleum (oil), natural gas, coal, nuclear, and renewable energy. In the last years shale gas has been taken the most important place in the economy. US policy on energy security focuses on research and development. The main objective is to provide access to energy resources in the lowest price. Polish energy policy strategy on the diversifi cation of routes and sources of energy. The political environment supported a few projects: shale gas sectors, nuclear energy and coal sector. At present, the amount of gas deposits in Poland is being estimated. This paper consists of three sections, an introduction and conclusions. The fi rst chapter presents the energy sectors in Poland and US, and the prospects of its development. The second analyzes the nature of the areas of transatlantic cooperation Polish-American. While the third part shows the eff ects of transatlantic cooperation between the EU and the U.S., for Polish, as a member of the Community. This paper is complemented by tables, graphs, and bibliography.