"Edson Arantes do Nascimento (Pele) remains in hospital. To receive the best care he was transferred in order to be monitored in a special care unit," read a statement released by the Albert Einstein hospital in Sao Paulo.
Pele underwent surgery for kidney stones on November 13 before being released two days later.
The unit to which the three-time World Cup winner has been admitted is strictly speaking a step before intensive care and will allow him to be monitored more closely than in a regular ward.
After confirming that he had been taken in on Monday, the hospital had said that Pele remained in hospital with tests showing the presence of a urinary infection.
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Two years ago, on November 15, 2012, he underwent a hip operation in the same hospital.
Pele, nicknamed O Rei (The King), was born in a humble home in the city of Tres Coracoes, but is considered by many as the greatest footballer in history with his exploits for Brazil and a career which saw him score 1,281 goals in 1,363 games.