The topic of this final paper is "Same-Sex Partnership in EU Law" which is regulated by the Law on Same-Sex Communities and the Law on Life Partnership of Persons of the Same Sex, and has elements in many other laws, such as Family Law, Medically Assisted Fertilization Law, and ( European) Convention for the Protection of Human Rights and Fundamental Freedoms. The purpose of the legal order is to represent the right person. Marriage, a definition that characterizes the community of persons of different sexes, which is defined in the Constitution of the Republic of Croatia, a completely new institute has been introduced into Croatian legislation, and that is the living community of persons of the same sex. In the last twenty years, an increasing number of same-sex communities have been fighting before the law for equality in family law status. In the Republic of Croatia, the number of same-sex unions is growing from year to year, but this number is significantly lower than the European average. The connection between marriage and same-sex unions is that they arise but also end in an identical way, and that is a declaration of will before the competent body, ie the registrar. The biggest consequences are borne by children who are in such communities, due to non-recognition of the same, while these same rights are available to children who are in the so-called. normal communities. As the laws were regulated and entered into force, the legislator advocated that the right of mutual maintenance should be regulated in the same way in all communities. Currently, the most present model of same-sex relationships at the level of the European Union is the model of registered couples, and has the same basis of marriage or cohabitation, thus enabling them to acquire certain rights and obligations.