Jorge López Ruiz ( La Plata , April 1, 1935- Buenos Aires , December 11, 2018) was an Argentine musician , composer and double bass performer, performer and arranger of various genres of popular music, especially jazz. .His work includes El grito (1967) and Bronca Buenos Aires (1970), banned by the military dictatorship . In popular music he has been arranger and composer of themes for Sandro , Leonardo Favio and Piero , among others.

He was a regular participant in a series of meetings of improvisation and casual folk experimentation house Eduardo Lagos , named humorously by Hugo Diaz as folkloréishons , which in the manner of the jam sessions of the jazz , used to gather Lagos, Astor Piazzolla and Diaz, with other musicians such as López Ruiz himself, Oscar Cardozo Ocampo , Domingo Cura and Oscar López Ruiz , among others. With his quartet he was awarded by the Konex Foundation as one of the 5 best jazz groups of the decade in Argentina.