Eien (disambiguation)

Eien is a Japanese era name.

Eien may also refer to:


 * Eien (album), a 1999 album by Zard
 * "Eien" (Zard song), 1997
 * "Eien" (Beni song), 2012
 * "Eien / Universe / Believe in Love", a 2009 song by BoA