Mateus Moreira (d. 3 October 1645) was a Portuguese martyr, from Colonial Brazil, of the Catholic Church.

Mateus Moreira had his heart torn out from his back as he exclaimed, "Praise the Blessed Sacrament."

The celebration was held in St. Peter's Square in the Vatican in the presence of the bishop of Natal, Mossoró and Caicó, and about a thousand Brazilians.

At the 43rd General Assembly of the CNBB in Itaici/São Paulo in 2005, Mateus Moreira was stated as "Patron of the Extraordinary Ministers of the Eucharistic Communion".

In December 2005, the CNBB reported that the Holy See's Congregation for Divine Worship and the Discipline of the Sacraments had approved the Moreira as the patron of ministers.