Joan Triadu (30 July 1921 – 30 September 2010) was a Spanish literary critic, academic and writer.
A cultural and resistant anti-Franco activist, he participated in many significant Catalan cultural projects of the 20th century such as the Serra d'Or magazine, the magazine Ariel, Ariel, the newspaper Today or Òmnium Cultural.
He was the pioneer in the post-war Catalan courses.
In the role of pedagogue, he was the general director of the Cultural Institution of the CIC, an entity that created the Escola Thau Barcelona in 1963 and the Escola Thau Sant Cugat in 1996.