Former school teacher Maqbul Ahmed, 70, was elected as new Jamaat-e-Islami leader after a secret ballot of party members, the Islamist party said in a statement yesterday.
The post was lying vacant after its former chief Motiur Rahman Nizami was hanged in May after a tribunal convicted him of mass murder during the 1971 war of independence.
"I pay profound respect to Bangabandhu Sheikh Mujibur Rahman, the architect of the country's independence...," he said.
He also paid tributes to "other undisputed leaders of the Liberation War of Bangladesh" including slain president Zia-ur Rahman, who is the founder of Jamaat's ally BNP.
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BNP is the main opposition outside parliament as it did not take part in the 2014 elections after Jamaat was barred from contesting the polls following a Supreme Court ruling.
The new Jamaat chief also paid tributes to his predecessor Nizami and grand predecessor Gholam Azam, also a war crimes convict who died last year while serving imprisonment until death, recalling "their contributions to country's development and democracy".
"The government hanged five senior (Jamaat) leaders to death on false charges," Ahmed said.
Jamaat opposed Bangladesh's independence from Pakistan, but denies its leaders were involved in mass murders and rapes during the nine-month long conflict.
Several Jamaat leaders earlier said they would now reorganise the party with leaders free of war crimes stigma.