Deschamps and Benzema have been at loggerheads for months, with the Real forward left out of Les Bleus' World Cup squad.
The 28-year-old was suspended by the French Football Federation in December 2015 after an alleged blackmail attempt on France team-mate Mathieu Valbuena.
It has been reported that he asked to be reconsidered for selection, but was told the door was closed, with the FFF president, Noel La Graet, backing Deschamps' decision - to the chagrin of Benzema.
And, after watching France struggle to beat Australia in their opening game of the 2018 World Cup, Ibrahimovic called on the FFF to reinstate Benzema, even if it means dispensing with Deschamps.
"For me, it's not normal Benzema is not in the national team," he told BeIN Sports. "He's one of the best in the world, he won the Champions League, he plays in Madrid, that he's not in this team has nothing to do with football.
"If the coach has a decision in saying he's not good enough for this team then the coach should not be there, but Benzema should. It's very easy.
"I find it very ridiculous that he's not there because if you want to win, you get winners, and Benzema is a winner."
France face Peru next, while Australia will look to bounce back from their defeat when they take on Denmark.