Al-Khelaifi, however, claims that PSG could sign a "big player" for next season.
"It's only a rumour," Al-Khelaifi told L'Equipe. "He's at Real Madrid and I think he's very happy there.
"I'm not saying a big player won't arrive next summer. We've got the end of the season to deal with first, and we'll then begin to look at those questions."
Ronaldo joined Madrid from Manchester United in the summer of 2009 for £80m.