President Md Abdul Hamid administered the oath for Hossain as the 22nd chief justiceof the Supreme Court in Dhaka.
The chief justice's office fell vacant after Justice Surendra Kumar Sinha resigned in November last year, the Dhaka Tribune reported.
Sinha's resignation came six weeks after he went on a leave in October
Justice Miah was made the acting chief justice after Justice Sinha went abroad on leave.
Hours after the appointment of the new chief justice, Justice Miah resigned apparently for not being chosen to be the top judge, according to the reports.
Justice Miah was set to retire on Nov 10 this year, while Justice Hossain in December 2021.