The 23-year-old says that Carlo Ancelotti leaving would not make him want to depart and described the Ligue 1 success this season as "the greatest joy of my sporting life"
Speaking ahead of PSG's final Ligue 1 game of the campaign on Sunday, away to Lorient, the 23-year-old has insisted that coach Carlo Ancelotti's rumoured move to Real Madrid would not make him want to leave.
"I am 100 per cent staying at Paris next season," Pastore told Le Parisien.
"I will never forget that the owners of PSG were the first to trust me. I was one of the first recruits, and I arrived in Paris before Carlo Ancelotti."
The Argentina international also spoke gushingly about PSG's title-winning campaign, describing it as the finest moment of his career to date and admitting he has plenty of room for improvement next season.
"It is the greatest joy of my sporting life," he said. "Winning a championship is really hard. It is wonderful though.
"Everyone thought that Paris would win easily, but French football is difficult. Luckily, we won a lot of games.
"I'd give myself a seven out of 10 [for the year]. I have not always been very good, but I believe I have finished the season at a good level. I have to be more consistent though."
Pastore has featured in 32 of PSG's Ligue 1 matches this season, scoring four goals and creating another five.