Straightener (ストレイテナー, Sutoreitenā) is a Japanese alternative rock band.
The band started out as a duo with Atsushi Horie (vocals/guitar) and Shinpei Nakayama (drums) in 1998.
They established an independent label named Ghost Records in 2002.
In October of the same year they released a single, "Traveling Gargoyle" from Toshiba EMI.
Straightener have performed at numerous festivals and live tours.