Eri Klas (7 June 1939 – 26 February 2016) was an Estonian conductor.

He premiered Alfred Schnittke's 1st Cello Concerto (Munich Philharmonic, 1986) and Peer Gynt ballet (Hamburg State Opera, 1989), and worked on the diffusion of the Estonian symphonic repertory.

Klas was also active as a pedagogue, holding professorships at the Sibelius Academy (1993–97) and the Estonian Academy of Music and Theatre (1997 until his death), where he received an honorary doctorate.

Klas was decorated with the Order of the Lion of Finland (1992, on the occasion of Finland's 75th Independence Day) and the Estonian Order of the White Star.

From 1972 until 1991, he was married to ballet dancer, singer and actress Ülle Ulla.