The 1984 Copa de la Liga was the second edition of Copa de la Liga.

Due to time constraints, saturation and club pressure, the Copa de la Liga only lasted four years since 1982, being cancelled in 1986.

The Copa de la Liga was played by 18 teams of 1983-84 La Liga and 4 winners of 1983 Copa de la Liga of Segunda División, Segunda División B and Tercera División.

The team that had the higher aggregate score over the two legs progressed to the next round.

The 1983-84 Copa del Rey final teams were exempt until the second round.