Claudio Jorge Willer (2 December 1940 – 13 January 2023) was a Brazilian poet, translator, essayist and critic.

Of German Jewish descent,[1] Willer graduated in psychology, from University of São Paulo (USP) (1966), and in Social and Political Sciences, from Fundação Escola de Sociologia e Política de São Paulo (1963), and received his PhD in literature, from USP, in the area of Comparative Studies of Portuguese Language Literatures, with the thesis Um Obscuro Encanto: Gnose, Gnosticismo e a Poesia Moderna, approved with distinction on 28 March 2008.

He completed post-doctoral studies in 2011, also in literature at USP, with essays on the theme "Strange Religions, Mysticism and Poetry".

[2] Along with Sergio Lima and Roberto Piva, he was one of the few Brazilian poets mentioned in a review on surrealism in São Paulo, published in February 1965 by the French periodical La Bréche - Action Surréaliste, directed by André Breton.

[3] As a critic and essayist, he wrote for several Brazilian newspapers: Jornal da Tarde, Jornal do Brasil (section Ideias), Folha de S. Paulo, O Estado de S. Paulo, Correio Braziliense, Isto É and Cult magazines, and for alternative and independent press publications: Versus newspaper, Singular and Plural magazine, O Escritor da UBE newspaper, Linguagem Viva, Muito Mais, Página Central, Reserva Cultural (cinema), and others.