Reports in France and Italy have suggested that the Brazil international is a target for the Ligue 1 champions.
But the 28-year-old playmaker insists he is happy at the Serie A club where has two years remaining on his contract.
"I have a deal until 2015 and I feel good at Lazio," said Hernanes, quoted in Lalaziosiamonoi.
"The market is open until September 2nd but the PSG talk is just rumours."
Hernanes joined Lazio from Sao Paulo in 2010 and has made 17 international appearances for Brazil since making his debut against Sweden in 2008.