The aim of this research paper is to examine the marriage type in Adi tribe and also the rituals associated with it. Adi community is one of major indigenous group of Arunachal Pradesh. Adi beliefs that they are descendents of abutani and “abor” the terms mean “independent”. The collective name of the Padams, Milangs, Komkars, Minyongs, and Pasis is Adi, which translates to "hill people". The East Siang district of Pasighat, Roing and Dambuk areas are home to the Adis, who make up a significant group. Mongku village is located in Bogong Tehsil in Pasighat in the East Siang District in the Indian state of Arunachal Pradesh. Some people also found in the Autonomous region of Tibet, China. Adi follow Donyi polo religion where Doyni means ‘Sun’ and Polo means ‘Moon’ and the rituals of marriage are found on the basis of their religion. In Adi community some people are also converted into Christianity and their marriage is based on Christian’s norms.