Roberto Pisani Marinho (December 3, 1904 – August 6, 2003) was a Brazilian businessman and tycoon who was the founder and owner of media conglomerate Grupo Globo from 1925 to 2003, and during this period expanded the company from newspapers to radio and television.

Marinho founded and was the president of the Brazilian TV channel, Rede Globo, the biggest television network in the country; it now has 123 stations and associates.

On July 29, 1925, his father Irineu Marinho started a morning newspaper called O Globo in Rio de Janeiro, which he had intended to complement his afternoon paper.

[4] According to journalist Aristotle Drummond, Marinho was a loyal Catholic who opposed the "liberation theology" developed in Latin America in the 1970s, in which leading clerics supported popular political movements seeking social justice.

He criticized his friend Helder Câmara,[5] who was archbishop of the "miserably poor" Olinda and Recife diocese from 1964 to 1985, during the worst of the military dictatorship.