Pele insists Cristiano Ronaldo should forget about moving to Real Madrid and honour his Manchester United contract.
The Brazil legend also dismissed Fifa president Sepp Blatter's claim that there is "modern slavery" in football and Ronaldo should be free to move.
Pele, in Stoke for a charity match for the Gordon Banks Foundation, said: "You are a slave if you work without a contract or you don't get paid.
"If you have a contract then in any job you have to finish the contract."
Pele added: "I think that when he finishes his contract, then he should be free to go wherever he wants to go."
Ronaldo has four years left on his Old Trafford contract and is currently recovering from ankle surgery which will rule him out of the start of next season.
Former England goalkeeper Banks accused Cristiano Ronaldo of showing a lack of respect to Manchester United boss Sir Alex Ferguson.
Banks said he could not understand why Ronaldo, who scored 42 goals for United last season, would want to move away from Old Trafford to Real Madrid.
He said: "I can't understand why he said he felt he was being treated like a slave. If he has just signed a new contract then he should respect his manager and honour it. It's stupid.
"I don't understand what the problem is. He plays for a team that has just won the European Cup and the Premier League. He plays for his country. What more does he want?
"It's like anything in life. If a businessman signs a contract then he has to honour it. It' s no different than a professional footballer."
Banks was speaking at a press conference ahead of a charity match in his honour on Saturday when a Banks XI will take on a Pele XI at Stoke's Britannia Stadium.
The former England keeper pulled off arguably the best save in history from a Pele header at the 1970 World Cup in Mexico.
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