The midfielder has extended his contract with the Parisians until the summer of 2016, the Parc des Princes outfit confirmed on Friday
Motta's existing deal was due to end in June 2015. The Brazil-born Italy international moved to the French capital from Inter in January 2012, and has since scored eight goals in 65 appearances for Laurent Blanc's men.
Confirming the news, the club tweeted: "Paris Saint-Germain is pleased to announce the extension of the contract of Thiago Motta until 2016."
Motta told the club's official website: "I'm very happy to pursue my dream with Paris Saint-Germain. I hope to continue to help the club reach their very ambitious goals in France and Europe."
While club owner Nasser Al-Khelaifi expressed his delight at the deal.
He added: "We're very proud to extend with Thiago Motta, an exceptional player on the pitch and elegant off it. He symbolises our ambitions."
Blanc's men visit Toulouse in the league on Sunday.