The purpose of the article is to show the identity of the priest resulting from participation in the only priesthood of Christ and to indicate the main places of the priestʼs responsibility towards the Eucharist, of which he is the minister. The Church teaches that with the event of Jesus Christ, the Old Testament priesthood is replaced by the priesthood of Christ, and since then priests, by virtue of the ordained sacrament, exercise their office by participating in the only priesthood of Jesus Christ and exercise it in persona Christi Capitis. The ministerial priesthood becomes a special task to proclaim the Gospel and celebrate the Holy Sacraments. This task, responsibility, first and foremost relates to the mystery of the Eucharist, in which the ministry of priests finds its fullness. A dignified celebration of the Holy Sacrifice in the congregation of the faithful, care for respecting and deepening the awareness of the Sacrum Eucharist and receiving it in a state of sanctifying grace, these are the main places of responsibility of priests who, being ministers of the Eucharist, are especially responsible for it.