The TV chef, who hosts Hell's Kitchen, explained that Oliver is not accepted by "professional" cooks.
He told The Star: "I don't look at Jamie as a chef. He's never won a Michelin star. Because of that, he's not really accepted by the professional chef world.
"Yes, he inspires a lot of people to cook, but he doesn't fall under that category of great chefs."
The 49-year-old has trained chefs such as Gordon Ramsay and Heston Blumenthal.