Howard, 29, was drafted by the Red Wings in 2003 and has played with Detroit since the 2009-10 season. The new deal, worth a reported $31.8 million, will link him to the team through the 2018-19 season.
"Jimmy is one of our most valuable players who is entering the prime of his career. He gives a chance to win every night," Red Wings General Manager Ken Holland said.
Howard is 17-12-6 this season with a 2.31 goals against average. He's 127-66-25 in his career a 2.39 GAA for his career.