• Bruce Dickinson – hát chính (1981–1993) (1999–nay)
• Steve Harris – bass, hát nền (1975-nay)
• Dave Murray – guitars (1976–1977) (1978–nay)
• Adrian Smith – guitars, hát nền (1980–1990) (1999–nay)
• Janick Gers – guitars (1990–nay)
• Nicko McBrain – trống, bộ gõ (1982–nay)

• Michael Kenney - keyboard (1988-nay)

Hát chính:

• Paul Day (1975–1976)
• Dennis Wilcock (1976–1978)
• Paul Di'Anno (1978–1981)
• Blaze Bayley (1994–1999)

Chơi guitar:

• Terry Rance (1975–1976)
• Dave Sullivan (1975–1976)
• Bob Sawyer (1977)
• Terry Wapram (1977–1978)
• Paul Cairns (1978–1979)
• Paul Todd (1979)
• Tony Parsons (1979)
• Dennis Stratton (1979–1980)

Tay trống:

• Clive Burr (1979–1982) (đã mất)
• Ron "Rebel" Matthews (1975–1977)
• Thunderstick (1977)
• Doug Sampson (1977–1979)