Marcial Martínez Cuadros (La Serena, July 30, 1832 — Santiago, February 8, 1918)[1] was a Chilean lawyer and liberal politician.

In 1862 he joined the Faculty of Humanities of the University of Chile, where he collaborated as a teacher, dean and researcher of History.

He was elected Deputy for Curicó, Santa Cruz and Vichuquén (1864–1867), and at the time he joined the permanent commission of Government and Foreign Relations.

Chilean historian Gonzalo Bulnes [es] describes his style as naive,[3]: 95  with fellow historian Mario Barros van Buren agreeing:[4] Anyone could be a victim of error like Minister Martinez, having just arrived in the country, without relationships, with little knowledge of the language, flattered in his vanity as a man and as an official by the demonstrations of the warmest sympathy.He was elected Senator for the province of Aconcagua (1894–1900).

King Luís I of Portugal decorated him with the Grand Ribbon of the Order of the Immaculate Conception of Vila Viçosa, which gave him the right to use the title of viscount.