Mar Abdisho IV Maron was the second Patriarch of the Chaldean Catholic Church, from 1555 to 1570.

The Chaldean Catholic Church is an Eastern Catholic particular church in full communion with the Holy See and the rest of the Catholic Church, and is headed by the Chaldean Patriarchate. Employing in its liturgy the East Syriac Rite in the Syriac dialect of the Aramaic language, it is part of Syriac Christianity. Headquartered in the Cathedral of Our Lady of Sorrows, Baghdad, Iraq, since 1950, it is headed by the Catholicos-Patriarch Louis Raphaël I Sako. In 2010, it had a membership of 490,371, of whom 310,235 (63.27%) lived in the Middle East.