Abstract There is little consensus between European States regarding the legal treatment of surrogacy in general and of transnational commercial surrogacy in particular. Against this background, the jurisprudence of the European Court of Human Rights (ECtHR) in this matter is of particular significance since it provides some common ground for the legal treatment of transnational commercial surrogacy in Europe. For this reason, the present paper will outline the development of the jurisprudence of the ECtHR on transnational commercial surrogacy, giving particular attention to the Mennesson and Labassee decisions, the Paradiso/Campanelli case, and the 2019 Advisory Opinion. On this basis, it will conclude by underlining the importance of the best interests of the child principle in the jurisprudence of the ECtHR on transnational commercial surrogacy.