One in ten citizens of EU was born outside of the country they now live in. In other words, out of more than 50 million immigrants who inhabit EU, 35 million were born outside of Europe. In the last 15 years, the percentage of the migrants has risen by more than 30% and the issue of integration hit the top of the agenda of the European Commission and member states. Active participation of immigrants and their children in the education system, in labour market and just generally in social life is important for securing the social cohesion of the country as well as enabling the migrants to live in a new society as full, independent and successful members. On the level of the EU, documents were passed that manage refugee’s flow, aid to refugees and integration policies, while on the national level certain number of EU member states have adopted mandatory programs for refugee integration, as a precondition for their stay in the respective country. Despite of these efforts, actual data show that in most countries, even after a few generations, the immigrants acquire a lower level of education, higher unemployment rate and usually hold worse jobs than similar natives. This thesis presented the process of migration and how EU developed its politics on social integration. Four countries (the United Kingdom, Germany, Italy and Denmark) and their politics of integration were studied and analysed in more detail.