Mario Raúl Negri (born 6 February 1954) is an Argentine Radical Civic Union (UCR) politician and lawyer.

Mario Negri was born and lived all along his childhood in Lucas González, department of Nogoyá in Entre Ríos province.

His father, Noé Santiago Negri, worked in the oil industry and his mother Elisabeth Sobrón was a teacher.

During this period he started to be active in Franja Morada, the university leg of the Radical Civic Union (UCR).

He was also a member of the Renovation and Change Movement in Córdoba Province, an internal group of the Radical Party founded by former Argentine President Raúl Alfonsín in 1972.

[16] As an active member of Franja Morada, Negri was illegally captured by para-policial forces a couple of months before the coup d'état of 24 March 1976.

The detention happened at midnight on 3 December 1975 when the forces broke into the apartment that he had rented with his brothers at the Maipú neighbourhood on the South East of Córdoba City.

[19] Negri was traveling with his private assistant Pascual Scarpino, the News manager of Televisión Pública Argentina Jorge Neder, the pilot Máximo Rodríguez and the copilot Héctor Alberto Tessio.

Scarpino, Rodríguez and Tessio died, while Negri suffered several injuries and 39 fractures, which forced him to remain in hospital for some months while being operated on a number of occasions.