Patrice Bergeron brought the Bruins within one, scoring 7:38 into the second period to cut Montreal's lead to 2-1, but the Habs answered with a goal from Yannick Weber 17:21 into the second and took a 3-1 lead into the intermission.
Carey Price, who made eight second-period saves, has 23 saves through two period for Montreal while Tim Thomas has 20 saves for Boston.
Boston holds a 24-23 advantage in shots, but Montreal outshot the Bruins, 15-9, in the second period. Both teams have registered 11 penalty minutes and both have had three power play opportunities.