Eri Klas (born 7 June 1939 in Tallinn) is an Estonian conductor.
Klas has mainly worked in the Nordic scene since, but might be best known for his work leading the defunct Netherlands Radio Symphony Orchestra. He premiered Alfred Schnittke's 1st Cello Concerto (Munich Philharmonic, 1986) and Peer Gynt ballet (Hamburg State Opera, 1989), and has worked on the diffusion of the Estonian symphonic repertory. He is also active as a pedagogue, holding professorships at the Sibelius Academy (1993–97) and the Estonian Academy of Music and Theatre (1997– ), where he has received an honorary doctorate.
He has been decorated the Order of the Lion of Finland (1992, on the occasion of Finland's 75th Independence Day) and the Order of the White Star, and is an UNICEF Goodwill Ambassador. In 1986 he was named a People's Artist of the USSR. A former Estonian lightweight junior boxing champion, he is also a member of the Estonian Olympic Committee.