“Leo Messi returns to training Monday morning,” tweeted the club along with a photo of the 35-year-old in action.
His return makes it likely he will feature in PSG’s home match with relegation-threatened Ajaccio next Saturday.
PSG hold the whip hand in defending their Ligue 1 title, a six point lead over Lens with four matches remaining.
He was suspended by the Qatar-owned club after failing to turn up for training last Monday.
Instead, the seven-time Ballon d’Or winner travelled to Saudi Arabia without PSG’s permission to fulfill commitments as part of a contract with the country’s tourist office.
Messi subsequently apologised in a video posted on Instagram to his 458 million followers.
“I had organised this trip to Saudi Arabia having cancelled it previously. This time I couldn’t cancel it. I am sorry for what I did and I wait to see what the club decides to do.”
The affair has made it increasingly unlikely that Messi will remain at PSG beyond this season, when his two-year contract with the club expires.