Eternal Flame is Do As Infinity's seventh studio album, released on September 30, 2009.

This is the first new album the band released after reforming, and is the first album by the band not to have Dai Nagao on the staff, though his song "Tangerine Dream" was remixed as a bonus track.

Two of the tracks were originally featured on Do As Infinity's 21st single "∞1" (2009).

Three of the songs were featured on Japanese television: "Saigo no Game", "Meramera", and "Piece Of Your Heart".

was held to give Do As Infinity fans a chance to compose songs that the band would later perform.