A motorcade has taken Slobodan Milosevic from hospital back to Central Prison.
The move follows a judge's order that he is fit enough for continued detention.
The former Yugoslav president had been taken to hospital last Wednesday after complaining of chest pains.
Milosevic, 59, was in one of three cars with its windows darkened. Seven police jeeps accompanied the convoy.
Milosevic was transferred shortly after Miroslav Vasic, one of the team of lawyers representing him, announced the court decision to return him.
He said Milosevic's lawyers have not seen the medical conclusions of physicians examining their client.
Vasic says Milosevic is being returned to his original cell, and that his treatment there will be the "same as before his hospitalisation."
Doctors examining Milosevic on Thursday found no evidence of heart disease and a scan of his coronary arteries was in order, officials said earlier.
The former president was diagnosed as having high blood pressure - a condition he already had when admitted to the prison April 1.
Milosevic is being detained for 30 days under a court order, pending an investigation into abuse of power and corruption charges. These may be expanded to examine other alleged crimes, including ordering political assassinations.