*[[Lee Mars]] (1990-1991)
*[[Nick Rushe]] (1989) ([["Pretty Hate Machine" Promotional Tour]] only, replaced by Haymes)
*[[Gary Talpas]] (1989) ("Pretty Hate Machine" Promotional Tour only, replaced by Rushe; also the original NIN art director)*[[Chris Vrenna]] (1988) ([[VIVIsectVI Tour]] only, replaced by Talpas and Rushe)
*[[James Woolley]] (1991-1994)
====Drums====
*Brian Liesegang (Helped in the studio on ''Broken''; featured in one of the music videos for "[[Gave Up]]"; may have replaced Lee Mars for a few dates)
*[[Dave “Rave” Ogilvie]] (1997-1999) (Was listed as full band member on the "I'm Afraid Of Americans" remix along with Reznor, Lohner, Clouser and Hillebrandt)
*[[Gary Talpas]] (1989) (Supplemental member for a few dates of the "Pretty Hate Machine" Promotional Tour; also the original NIN art director)
===Prospective Members===