Lille looked as if they were going to make it two wins from two under manager Davide Ancelotti thanks to two goals set up by Olivier Giroud.
First the 39-year-old former France striker picked out Hakon Haraldsson to fire in from 20 yards out.
Dilane Bakwa, making his debut following a loan move from Nottingham Forest, curled in a fine second goal on 84 minutes.
Vitinha picked out the top corner with an excellent strike in the 91st minute to give PSG hope.
And four minutes later the Portuguese crossed for Marquinhos to head in an equaliser.
PSG goalkeeper Matvei Safonov played despite appearing to sustain neck and facial injuries during the warm-up.
Safonov collided with a member of PSG’s coaching staff diving for the ball and needed treatment on the pitch for several minutes.
Last week PSG trailed Rennes 2-0 before battling back to draw.
They are yet to win domestically this season – losing 1-0 to Lens in the Trophee des Champions – but did beat Aston Villa 2-1 in the Uefa Super Cup.
