Ignacio Piñeiro Martínez (Havana, 21 May 1888 - 12 March 1969) was a black Cuban musician and composer whose career started in rumba, and flowered in the rise of the son. He was one of the most important composers of son music; in total he wrote about 327 numbers, mostly sones.
Piñeiro was a brilliant rumbero who worked with musical groups from 1903 onwards. In 1906, was a member of the ''Timbre de Oro'' clave y guaguancó vocal group, and later directed ''Los Roncos'' guaguancó group. He was taught the double bass by María Teresa Vera, and in 1926 he was a member of her band Sexteto Occidente, which recorded in New York. In 1927 he founded the Sexteto Nacional; its original name was ''El Sexteto Nacional de Ignacio Piñeiro'', and he wrote all its original numbers. Later, adding a trumpet, it became Septeto Nacional.
For financial reasons, he quit the group in 1935, and it was led by the trumpet player Lazaro Herrera until the group disbanded in 1937. Piñeiro became for some years the leader of Los Roncos, a rumba group, for whom he also wrote pieces. The ''Septeto Nacional'' was recreated several times from 1954 onwards, initially under Piñeiro's direction. It still exists.