The members of the assembly elected the new leader of the house by balloting. Chaudhry Abdul Majeed of PPP got 35 votes while Raja Farooq Haider Khan from PML-N got 11 votes.
PPP remained dominant in the assembly which favoured in the election of Abdul Majeed as the prime minister.
PPP has also announced Chaudhry Yasin as a senior minister.
Earlier, 46 elected members of the legislative assembly took the oath in the session chaired by outgoing speaker Choudhary Anwar-ul-Haq.