The article is devoted to the researching Mari bans (ойöрö). The religious, ethical and aesthetic views of Mari people are reflected in brief form of bans. Until now, the behavior of the Mari people is mainly determined by bans in life and during the fulfilment of ritual observance, rituals. The bans related to the wedding ceremony, according to the views of the Mari, facilitate the transition to a new status, providing a harmonious family life, protecting the rights and freedoms of evil forces and spirits. The wedding ceremony performed an important social psychological function, ensuring the transition of young people to a new status. At this decisive moment in the life of the newly-weds, they could be faced with various dangers, which, according to the ideas of the Mari, came from evil spirits, sorcerers. That is why during the wedding, the regulations and prohibitions were observed. In addition, the bans, observed during the wedding ceremony, were called to create conditions for a happy future for a young family, to facilitate the transition of a bride from one family to another. With the prohibitions, the choice of the bride and groom begins: a strict ex-ogamy is observed. The bride at the wedding was forbidden to cry for fear that her whole life in marriage would pass in tears. Strictly forbidden it was to try on bride’s dress. It was believed that so it is possible to steal the happiness of a future family. The wedding dress was not worn afterwards, it was not given to anyone. The relatives should not dress up the bride out of fear that the bride will get sickl. The bride and groom should not look back when they go to the groom's house. One of the strictly observed is the prohibition to let anyone between the bride and groom pass. They believe that their life will deteriorate, they can divorce. The study draws attention to similar taboos of other Finno-Ugric peoples, as well as the peoples with which the Mari have contacted and continue to live in a good neighborhood (Russians, Modern Mari wedding as a folk-drama complex, although undergoing significant changes, but continues to be part of the national culture. Observance of prohibitions is an indicator that in the Mari wedding the religious beliefs of the people are reflected; Many elements of the wedding are given a mystical and symbolic meaning. Bashkirs, Tatars, Chuvashes).