Introduction. Adapting immigrants and their children to the socio-cultural reality is related to the relocation of individuals and groups who settle in another country. The ability to function in new conditions requires adapting to them and integrating with the host community. States are interested in including new citizens in the mainstream of their societies. However, this requires a lot of thoughtful actions and the establishment of institutions and organizations that will be focused on the integration of immigrants with society in the country of settlement. Objective. The aim of the article is to analyse the process of adapting immigrant children to the new socio-cultural reality. Materials and methods. The study uses the method of analysing and comparing models of the functioning of adaptation processes in three countries (Poland, Germany, and Sweden). Results. In the studied countries, the adaptation of immigrant children to new living conditions is organized on the basis of intercultural education. It is conducted mainly in schools, foster care institutions, and non-governmental organizations. Conclusions. Adaptation of immigrant children and its effectivity depends on the tradition of admitting immigrants, expectations connected with it, and the amount of immigration in the given country.