Beckham, 36, has been linked with a move to the French giants in recent weeks as his contract with Galaxy is coming to an end.
Zidane, who played alongside the former Manchester United star at Spanish giants Real Madrid between 2003 and 2006, believes that he would be a good addition to PSG but has concern over his age.
"It could be good," the Frenchman told RTL.
"Of course, the concern over his age is always there, but he is a great professional who gives everything for his team and always fight. That is important, the main thing.
"We will have to see if he maintains that necessary capacity, but if both sides are keen, then why should he not sign for PSG?"
"I love football, although I would not celebrate if he did go to PSG because I am a fan of Marseille," added Zidane.
The 39-year-old, who is currently working as Madrid's sporting director, also reflected on his time spent with Beckham at the Bernabeu.
"Before getting to know him I had the same impression as everyone else, the one that you see through the media," said Zidane.
"But after that, during our three years together in the same team, I found out what a great person he is, who does not look to blame others for his mistakes."