Convener of Bangladesher Samajtantrik Dal and freedom fighter AFM Mahbubul Haque died at a hospital in Canada on Friday morning.
He is survived by his wife, one daughter, colleagues, relatives and well-wishers to mourn his death, said a press release.
Mahbubul was hospitalised on September 26.
He was born at village Mohammadpur under Chatkhil upazila in Noakhali on December 25, 1948.
In a message of condolence, leaders of Bangladesher Samajtantrik Dal expressed deep shock at the demise of Mahbubul Haque.
They also prayed for eternal peace of the departed soul and conveyed sympathy to the bereaved family.