||This bachelor thesis deals with the liberalisation of the gas market. In the first part, the European Union is studied along with its attitude to liberalisation processes. History of liberalisation is mentioned as well as last findings, opinions and European gas market characteristics. Second part deals with the description of the development of gas pricing mechanism. Third part focuses on the process of liberalisation in the Czech Republic. At the end, the industrial and household data from 2001 to 2011 are analysed.