María Rosa Yorio (born August 28, 1954 in Buenos Aires) is an Argentine painter, singer, songwriter, instructor and band leader.

Born in Buenos Aires, Argentina; María Rosa started doing vocals with legendary band Sui Generis and gained recognition as a leading female singer of PorSuiGieco.

She rose to fame with Los Desconocidos de Siempre along with band leader Nito Mestre.

On her debut album "Con los ojos cerrados" (1980), she was supported with recognized musicians such as Charly Garcia, Juan Carlos "Mono Fontana, Nito Mestre, David Lebón, Alejandro Lerner and María Gabriela Epumer among others.

She returned to classic folk with "Por la vida" (1984) turning to pop sound on "Puertos" (1986), adopting "Yorio" as her only stage name.