The Bianconeri official has dismissed talk of the 21-year-old leaving Turin, insisting that he is confident of persuading the midfielder to sign a contract extension
The 21-year-old enjoyed a fine first half to the season but his poor form since January has sparked speculation that he has had his head turned by PSG's reported interest in signing him this summer.
Marotta, though, insists that there is no truth in stories that Juve have already agreed to sell the midfielder.
"The rumours about the transfer of Pogba to PSG have no foundation," he told La Repubblica. "We want to keep Paul and prolong his contract.
"It's true that €70 million [£58.8m] would be an attractive figure, but Juventus is a club that always aims to win trophies.
“In the past, these kind of sacrifices have been made - for example, we sold [Zinedine] Zidane to take [Gianluigi] Buffon and [Pavel] Nedved - but this is not the case.
“Anyway, today we do not have a concrete proposal, so there is nothing to talk about.”
With Juve currently eight points clear at the top of Serie A, Marotta admitted that he is hoping that Antonio Conte's men pull off a league and cup double by winning the Europa League at Juventus Stadium on May 14.
He said: “A third consecutive title would go into history and as for the cup, the final in our stadium gives us even more reason to honour this competition.”