Brady, 39, won a record fifth Super Bowl last month after inspiring the Patriots to their comeback win over the Atlanta Falcons.
But while that pulsating victory was viewed by many as the crowning achievement of an extraordinary career, Kraft says Brady is a long way from being ready to call it a day.
"As recently as two, three days ago, he assured me he's willing to play six, seven more years," Kraft said on the sidelines of the NFL owners meeting in Phoenix.
Kraft is confident Brady can emulate retired Hall-of-Famer Brett Favre, who played past his 40th birthday to lead the Minnesota Vikings into the playoffs in 2009-2010.
"At the level he performed, there is no one who would be happier than I am and our fan base," Kraft said.
"When you think about it, there's one player at the age of 40 who had one good year: Favre."
Kraft also hopes to persuade Bill Belichick to remain at the helm of the franchise for as long as possible, comparing the Patriots head coach to successful business tycoons.
"You see Warren Buffet and Rupert Murdoch, they're in their mid-eighties and performing in a pretty high level, so we're going to keep Bill healthy," Kraft told reporters.