One convict was executed in Adiala Jail for killing six people while another was hanged for killing a colleague.
Two more murder convicts were executed in Gujranwala Central Jail. Another prisoner was hanged in Faisalabad Central Jail. He was convicted of killing a woman during robbery.
Pakistan had already hanged 71 prisoners since lifting moratorium on the death penalty in December last year after Taliban attack at an army-run school in Peshawar killed more than 150 people, mostly students.
The UN, the European Union, Amnesty International and Human Rights Watch have urged Pakistan government to re-impose the moratorium on the death penalty.
