Goal can confirm that the goalkeeper has agreed a two-year deal with the reigning Ligue 1 champions after an emotional farewell from Juventus.
Buffon will undergo medical exams on Friday, and will be presented as PSG's latest signing the following Monday.
He will be under contract at Parc des Princes until June 2019, with the option to extend his stay for a further season.
At 40 Buffon is still considered one of the world's elite keepers, having been the foundation of Juve's seven consecutive Serie A titles.
He made a total of 656 appearances for the Old Lady in a glittering 17-year spell, although he never managed to lift the Champions League with Juve.
Now he is tasked with the challenge of spearheading a new challenge for the top trophy with PSG, who will look to improve on a last-16 finish last season under the tutelage of new coach Thomas Tuchel.