Bent was reportedly targeted by several Premiership giants but he opted at last to stay with his club.
"Although I'm flattered to be linked with the country's biggest clubs I owe Charlton as they gave me my Premiership chance," Bent told Charlton's website on Tuesday.
"I've a good feeling about this season. If I can match what I achieved last season I will be delighted."
Bent had a remarkable campaign in the 2005-2006 season when he found the net 18 times to become the most prolific English striker in the league.
Charlton new manager Iain Dowie was delighted to have the 22-year-old in his squad.
"This is fantastic news for the club and I think the chairman is to be congratulated on securing Darren's signature for the next four years," he said.