Abstract: The existence of legal void in marriage law for Indonesian citizens who engage in inter-religion marriages raises legal uncertainty. Meanwhile, perhaps due to the fact that Indonesia has plural society, the number of potential couples who engagee to inter-religion marriages increases. The purpose of this study is to formulate the concept of legal norms protection for inter-religion marriages in Indonesia. The material of legal components consists of primary and secondary legal which obtained from literature study. We found that the state should provide a space which is recognized by every citizen to exercise his or her rights including the right to raise a family and the right to have freedom related to religion and belief. The basis of the recognition is that inter-religion marriage is philosophically justified because of human rights and it is legally required to provide legal certainty. Meanwhile, sociologically it is increasing in society.