Pat Hickey has been bailed under house arrest.
A judge recommended that he should be released from jail on bail due to his "critical health".
Mr. Hickey has been in high security Bangu Prison since his arrest on the 17th of August.
Earlier today, Kevin Mallon, the Irishman arrested over alleged ticket touting appeared in court in Brazil as part of his bail conditions.
Both men deny allegations of wrongdoing.