Les Parisiens are three points clear at the top of the table, while Elie Baup's men come to the Parc des Princes looking to get their title challenge back on track.
"It's a huge match for the whole team and for everyone here in Paris," Pastore told reporters.
"We are obviously hoping for the three points to make our fans as happy as possible. This match means a lot to us and we will be giving our absolute maximum.
"Motivation is always incredible in this type of game. We know how much this game means to the supporters. That motivates us even more, obviously."
PSG lost 3-2 to Sochaux last Sunday.