Opener (Sunset, 1976) – compilation from 1972–1974 album material
Cannibalism (United Artists, 1978) – compilation from 1969–1974 album material (two tracks dropped for CD reissue)
Delay 1968 (Spoon, 1981) – unreleased material from 1968–1969
InCANdescence (Virgin, 1981) – compilation from 1969–1977 album material
Cannibalism 2 (Spoon, 1992) – compilation from 1974–1981 album material, also includes a two tracks from singles and one unreleased track, "Melting Away"
Cannibalism 3 (Spoon, 1993) – compilation from 1979–1991 solo album material
Anthology (Spoon, 1994) – compilation from 1968–1991 album and soundtrack material
Sacrilege (Spoon, 1997) – remix album, contains a remix of the hit "Spoon" by Sonic Youth
Agilok & Blubbo (Wah Wah Records Supersonic Sounds, 2009) – movie soundtrack recorded in 1968, recorded as The Inner Space[1]
Kamasutra: Vollendung Der Liebe (Crippled Dick Hot Wax!, 2009) – movie soundtrack recorded in 1968, released as Irmin Schmidt & Inner Space Production[2]
The Lost Tapes (Mute, 2012) – 3-CD or 5-LP box set compilation of unreleased studio and live recordings from 1968 to 1977 (UK #77)
The Singles (Mute, 2017) – CD or 3-LP compilation of all the singles (UK #83)
Bootlegs
Mother Sky (Asteroid, 1993) - live Waldbühne, West-Berlin June 1971
Horrortrip in the Paperhouse: Live 1972/73 (1994).
Radio Waves (Sonic Platten, 1997) – collection of 1969–1972 live and rare recordings
Zhengzheng Rikang (Nörvenich, 2006) – early 1969 bootleg
Singles
"Agilok & Blubbo" {Can as The Inner Space} / "Kamera Song" (Rosemarie Heinikel [de]) (Deutsche Vogue, DV 14785 – 1968)
"Kama Sutra" {Irmin Schmidt with The Inner Space} / "I'm Hiding my Nightingale" (Margarete Juvan) (Metronome, M 25128 – November 1968)