The bargain has a base salary of $2 million with $1.75 million in performance incentives, the team said.
The bargain keeps the 42-year-old Slovak indigenous with all the team through next season.
Currently playing his 21st season, Chara rankings sixth in franchise history in games played (948).
Chara was drafted in the next round by the Islanders in 1997 and signed by Boston as a free agent in 2006 after playing with the Senators.
Chara won the Norris Trophy as the league’s top defenseman for the 2008-09 season and has been around six allstar Games.
He’s 199 career aims with 4 4 0 aids and won a Stanley Cup with Boston in 2011.
Additionally for the Bruins, centre Sean Kuraly sustained a broken right hand in Thursday’s game against the Devils, the group said Saturday.
The 26-year-old had surgery and is expected to recover in about one month.