Focus Group Interviews (FGI) is a qualitative research method, that has been applied mainly in the field of marketing in Poland. Recently the advantages of this method have been also taken into consideration by social researchers including analysts of social policy. The article contains a description of FGI method and a short review of experiences with FGI gained by selected social research centres. The main part of the article concerns a research of the Institute of Social Policy of the Warsaw University. The goal of the article was firstly a presentation of the method in the light of practical experience (including some technical details) and secondly – wider popularization of application of FGI in the field of social policy studies. Presented examples of research regarded mainly such fields as migration (situation of immigrants in Poland as a subject of the research conducted among immigrants) and related questions. Actually the article is based on research conducted among quite difficult target group (type of respondents) and the type of the research group seemed to make a test of potential advantages and disadvantages of FGI more severe. Presented concepts and experiences with FGI as the method of migrations’ research may be also applied in other research fields of social policy.