Brain Salad Surgery is the fourth studio album by English progressive rock band Emerson, Lake & Palmer, released on 19 November 1973 by their own record label, Manticore Records, and distributed by Atlantic Records.
The album was recorded from June to September at Olympic and Advision Studios, and mixed in October 1973 at AIR Studios in London. As were all the group's previous works, it was produced by Greg Lake. The album includes a cover designed by H.R. Giger .