Causa Sui is a Danish instrumental psych-rock / stoner rock band composed of Jakob Skøtt, Jonas Munk, Rasmus Rasmussen and Jess Kahr.

[1][2] Beginning with their eponymous debut album, the band has released fourteen albums since 2005.

Causa Sui's heavy sound is supplemented by abstract, instrumental and ambient styles akin to electric Miles Davis, or Can, particularly on their 'Sessions' series of albums, which feature guest musicians.

Other cited influences include Popul Vuh, The Allman Brothers Band, Gabor Szabo, and Tame Impala.

[3] Despite seldom performing live, the band has released two live albums.