The general assembly of the High Constitutional Court approved Adly Mansour's appointment as Chief Justice on Sunday.
Mansour will replace Maher al-Behiery who retires on June 30.
A 2011 amendment to the law states that the president chooses the Chief Justice of the HCC from the three top deputies following the approval of the court's general assembly.
Before the amendment, Egypt's president was authoritized to appoint someone from outside the court and thus without the general assembly's approval.
The general assembly also agreed to appoint Ragab Selim as the chairman of the commissioners' board and thus as one of Mansour's three top deputies.