Eternal Tears of Sorrow (commonly abbreviated to EToS) was a Finnish melodic death metal band formed in Pudasjärvi.

The band was formed in 1994 by Jarmo Puolakanaho, Altti Veteläinen and Olli-Pekka Törrö, after various projects that featured people who became members of Eternal Tears of Sorrow.

They could not find a new rehearsal place in their hometown, so the three members started a new side-project (M.D.C.) and recorded a demo tape, Beyond the Fantasy, in autumn 1993.

[2] Between 1994 and 1996 the band had a couple of songs on some compilation CDs in Europe and Canada, and recorded their debut, Sinner's Serenade.

[8] The band's sixth album, Children of the Dark Waters,[9][1] came out in May 2009 through Suomen Musiikki in Finland, Massacre Records in the rest of Europe, and Marquee/Avalon in Asia.