It was serialized in Shueisha's seinen manga magazine Ultra Jump from October 2003 to June 2013, with its chapters collected in 16 tankōbon volumes.

Written and illustrated by Kami Imai, Needless was serialized in Shueisha's seinen manga magazine Ultra Jump from October 18, 2003, to June 19, 2013.

[12][11][a] The first opening theme is "Modern Strange Cowboy" by GRANRODEO and the first ending is "Aggressive Zone" by Needless★Girls (a group composed of the series' voice actresses, Aya Endo, Eri Kitamura, Emiri Katō, Saori Gotō and Yui Makino).

[11] Gargoyle also contributed the insert songs "Shi ni Itaru Kizu" (死にいたる傷) and "Magma Kid" (マグマキッド, Maguma Kiddo).

[11] In North America, Section23 Films announced in November 2010 that Sentai Filmworks licensed the series and that it would be released on Blu-ray and DVD.