Yamandu Costa (born January 24, 1980, in Passo Fundo), sometimes spelled Yamandú, is a Brazilian guitarist and composer. His main instrument is the violão de sete cordas, the Brazilian seven-string classical guitar.
Costa began to study guitar at age seven with his father, Algacir Costa, leader of the group Os Fronteiriços (The Frontiersmen), and mastered the instrument under the guidance of Lúcio Yanel [es], an Argentinevirtuoso, who lived in Brazil. At age fifteen, Costa began to study southern Brazilian folk music, as well as the music of Argentina and Uruguay.
At age seventeen he played in São Paulo for the first time at the Cultural Circuit Bank of Brazil; the concert was produced by Study Tone Brazil.
Yamandu Costa gained increased international recognition after he appeared in Mika Kaurismäki's 2005 documentary film Brasileirinho. The film showcased the vibrant world of Brazilian choro music and featured Costa’s impressive guitar skills, which helped him reach a broader audience. While he was already an established musician in Brazil, the documentary played a significant role in elevating his profile internationally.