The Nigerian Army has appointed Major General Benson Akinroluyo as the new commander of Operation Lafiya Dole.
Major General Akinroluyo has replaced Major General Abba Dikko as head of the operation, according to an army statement.
Akinroluyo becomes the fifth commander in two years to head the fight against the Islamist insurgents, who have staged a series of attacks on military bases, killing dozens.
Dikko was only appointed in July. Since then there have been at least nine attacks on military bases, most of them in the northern part of Borno state near the shores of Lake Chad.
Despite government insistence that Boko Haram is near defeat, northeastern Nigeria is still hit by regular attacks.