This is a timeline documenting the events of heavy metal in the year 1984.

Events

• October 23 — A debate over heavy metal music occurs on SVT's Svar direkt between Anders Tegnér and Siewert Öholm.^[1]

Newly formed bands

• Agent Steel
• Angel Dust
• Annihilator
• Atheist
• Barren Cross
• The Black Crowes
• Blasphemy
• Blind Guardian (under the name "Lucifer's Heritage" until 1988)
• Bloodgood
• Candlemass
• Celtic Frost
• Chastain
• Chrome Molly
• Concrete Sox
• Cranium
• The Crucified
• Cryptic Slaughter
• Dead End
• Deathrow
• Deceased
• Detente
• Deviated Instinct
• Dirty Looks
• Domine
• Enuff Z'Nuff
• Eudoxis
• Executioner
• Faith
• Fantom Warior
• The Firm
• FM
• Frehley's Comet
• The Front
• Grinder
• Gwar
• Heathen
• Héroes del Silencio
• Hellbastard
• Helloween
• Heretic
• Hirax
• Hittman
• Iced Earth
• Jack Starr's Burning Starr
• Jesters of Destiny
• Keel
• King Kobra
• KMFDM
• Korrozia Metalla
• Krabathor
• Kraken
• Leeway
• Living Colour
• Lobotomia
• Los Cycos
• Ludichrist
• Tony MacAlpine
• Massacre
• Mayhem
• Mefisto
• Messiah
• Mistrust
• Morbid Saint
• Mordred
• Necrodeath
• Nepal
• Nuclear Assault
• Obituary
• Phenomena
• Piledriver
• Powermad
• Praxis
• Primus
• The Quireboys
• Racer X
• Rage (under the name "Avenger" until 1986)
• Repulsion
• Sacrilege
• Sadus
• Sepultura
• Slaughter
• Soundgarden
• Steel Prophet
• Stratovarius
• Tangier
• Thanatos
• Uncle Slam (known as The Brood until 1987)
• Vendetta
• Victory
• Vinnie Vincent Invasion
• Warfaze
• Warrant
• Whiplash
• Wolfsbane
• Xentrix

Reformed bands

• Deep Purple

Albums & EPs