Enrique Kicho Díaz (Buenos Aires, 21 January 1918 – 5 October 1992) was an Argentine double bass tango musician who played in various ensembles including Aníbal Troilo’s orquesta típica, Astor Piazzolla’s first Quinteto and Conjunto 9 and finally Sexteto Mayor.
He began his musical career in 1935 when he joined a tango ensemble as double bass player with the pianist José Pascual and Anselmo Aiete.
In 1939, he joined the orquesta típica of Aníbal Troilo, which included Orlando Goñi (piano), Roberto Gianitelli, Juan Miguel Toto Rodríguez (bandoneon) and the singer Francisco Fiorentino.
In 1962 he joined Quinteto Real with Horacio Salgán (piano), Ubaldo de Lío, Enrique Mario Francini (violin) and Pedro Laurenz (badoneon) and occasionally played with the orquestra of Mariano Mores.
He was declared "Tango Double Bass Player of the Century" by the Legislature of Buenos Aires in 2000.