Simeone has won the Europa League, King's Cup and La Liga with Atletico. The 46-year-old Argentine also led the club to their second Champions League final in three years.
"The only doubt would be if Simeone leaves for PSG or wherever. I called him before extending my contract and he confirmed to me that he was staying," Griezmann told French TV programme Telefoot.
"I can learn a lot from him. PSG are not my goal at the moment. I'm happy in Spain. I'm always proud to be popular with the fans. I try to smile and do my best. If they like it, it's even better."
Atletico, who have started the new campaign with two points from their opening two games, will look for their first win at Celta Vigo on Saturday.
(Reporting by Ian Rodricks in Bengaluru; editing by Clare Lovell)
