This paper deals with access of health care of undocumented migrants in Switzerland. Firstly it provides a general overview of the health care system of Switzerland and exposes the main Swiss laws and regulations which regulate access of health care. In addition, this paper exposes the most important categories of health care providers and the cooperation of NGO-s which facilitate access to health care, as well as the issue of financing in the case of undocumented migrants. Moreover, it presents two studies related to the issue of access of healthcare. The first study regards the case of pregnant women and the second studies the most frequent health problems of undocumented migrants. Furthermore, the paper also exposes the issue of access of health care of the children of undocumented migrants.