Fans swarmed a PSG outlet on the Champs Elysees to buy shirts with Neymar’s name and number on the back as the 25-year-old forward headed for the city centre in a motorcade after arriving in a private jet shortly before 11am (0900 GMT) at Le Bourget airport north-east of Paris.
Neymar had flown in from Barcelona a day after completing a 222 million-euro ($264 million) move from the Spanish club and will earn a reported 30 million euros ($35.5 million) annually in a five-year deal.
“I am extremely happy to join Paris Saint-Germain,” Neymar said late Thursday.
“Since I arrived in Europe, the club has always been one of the most competitive and most ambitious. And the biggest challenge, what most motivated me to join my new teammates is to help the club to conquer the titles that their fans want.
“Paris Saint-Germain’s ambition attracted me to the club, along with the passion and the energy this brings. I played four seasons in Europe and I feel ready to take the challenge.
“From today, I will do everything I can to help my new teammates, to open up new horizons for my club and to bring happiness to its millions of supporters around the world.”
Neymar will appear at a press conference at the PSG’s Parc des Princes stadium at 1:30pm (1130 GMT).
He will then be presented to fans at the same ground at around 3:45pm on Saturday before the season-opening Ligue 1 fixture against promoted Amiens.
More than 1,000 fans showed up at the PSG store when shirts bearing his name went on sale Friday as the club wasted no time in cashing in on Neymar’s commercial value.