Machine Head is the sixth studio album by English rock band Deep Purple. It was recorded in December 1971 in Montreux, Switzerland, and released on 30 March 1972 by Purple Records. It is the band's third album to feature the Mark II line-up of Ritchie Blackmore, Ian Gillan, Roger Glover, Jon Lord and Ian Paice.

Deep Purple are an English rock band formed in London in 1968. They are considered to be among the pioneers of heavy metal and modern hard rock, although their musical style has varied throughout their career. Originally formed as a psychedelic rock and progressive rock band, they shifted to a heavier sound with their 1970 album Deep Purple in Rock. Deep Purple, together with Led Zeppelin and Black Sabbath, have been referred to as the "unholy trinity of British hard rock and heavy metal in the early to mid-seventies". They were listed in the 1975 Guinness Book of World Records as "the globe's loudest band" for a 1972 concert at London's Rainbow Theatre and have sold over 100 million albums worldwide.