The Communist ex-president had been in poor health for many years, reportedly blighted by intestinal problems.
But the cause of his death has not yet been revealed.State television broadcast images of the historic figure’s body.
His brother, Raul, announced his death on the state broadcaster.
He said: “The commander in chief of the Cuban revolution died 10.29pm tonight.”
The 84-year-old added: “According to the will of Commander Fidel, he will be cremated.