The work aims to show the relationship that occurs between the church authority and the celebration of the Eucharist. It is worth emphasizing that concepts such as potestas, auctoritas or iurisdictio are still at an early stage of research development, and are inextricably linked to the mission of preaching the Gospel and administering the sacraments, and constitute a specific heritage of the legal doctrine of the Church from which it is difficult to cut off when wanting to describe the issue in a canonical manner celebration of the sacrament of the Eucharist. In addition, canonical concepts such as bring, right, authorization, or duty allow a better understanding of the nature of the power necessary to celebrate the Holy Mass.