PSG boss Laurent Blanc is not expected to sign another striker, following the signing of Edinson Cavani this summer.
But Ibrahimovic is still hoping Rooney will join PSG if he chooses to leave United at the end of the season.
"When there was talk of Rooney joining us in Paris it was a prospect that excited me," he said.
"I think he made it clear in the summer that he wanted a fresh challenge -- and things have not been going so well for Manchester United this season.
"If he still wants to move next summer, or in January, I would urge him to come and play with me in Paris. The only direction this club is going is up."
The Sweden international admits he is keen to play alongside Rooney.
"If he did join he would have to get used to the fact that Zlatan scores even better goals than him," Ibrahimovic added.
"But I don't just want to play with great players, I want to play with technically great players -- and that is what he is.
"You can work on the technical side but it is not something you can be taught. You have it or you don't and Rooney does."