Marriage is a religious ritual that a man and a woman should perform. However, with time, there has been a desacralization of marriage that has led to the loss of sacred values, particularly through the practice of same-sex marriage. The legality of homosexual marriage or same-sex marriage has sparked debates in various countries, resulting in conflicts regarding the changing meanings of traditional marriage and the essence of family. This phenomenon is also related to the ongoing secularization, which poses a significant issue for the rapidly evolving Islamic civilization. This study aims to identify and understand the perspectives of various religions regarding same-sex marriage and to analyze the forms of desacralization occurring in marriage as a religious ritual due to the practice of same-sex marriage. This research employs a qualitative approach using descriptive methods to examine the views of different religions on same-sex marriage and analytical methods to analyze the forms of desacralization it produces. The approach used is Theological Normative approach, based on the holy scriptures of various religions related to the sacredness of marriage. Data were collected through literature studies from relevant books and journals, as well as holy scriptures. The results of the study indicate that various religions agree that marriage is a religious ritual between a man and a woman. Same-sex marriage is considered to alter the sacred meaning of marriage and does not align with the teachings of the holy scriptures, undermining the traditional family values that consist of one man and one woman, which are deemed essential for the continuation of generations. Same-sex marriage is viewed as a form of secularization, where the participants seek to legalize this practice to fulfill the rights of homosexuals, often disregarding religious teachings that contradict their desires. The author hopes that this work can make a significant contribution both academically and practically, especially in preventing the growth of same-sex marriage practices or practices that lead to the legalization of such. The researcher hopes that future researchers can use this study as a scientific reference and find inspiration for their investigations into the practice of same-sex marriage.