The Chief Minister was the head of the Australian territorial government of Papua and New Guinea from 1973, when Papua New Guinea was granted self-government, to 1975. Prior to self-government and after the end of the military administration of the jointly administered territory following World War II the head of the executive of the territory was the Administrator. After independence in 1975, the post became the Prime Minister of Papua New Guinea

Prime Minister of Papua New Guinea

The Prime Minister of Papua New Guinea, is Papua New Guinea's head of government, consequent on being the leader of the party or coalition with majority support in the National Parliament. Since 2 August 2011, the Prime Minister has been Peter O’Neill of the People's National Congress Party.-List...

. Michael Somare

Michael Somare

Sir Michael Thomas Somare, GCL, GCMG, CH, CF, KStJ, MP was Prime Minister of Papua New Guinea from 2002 to 2011; he had previously been Prime Minister from independence in 1975 until 1980 and again from 1982 until 1985. Somare's first two terms were as a member of the Pangu Party, but he then...

was the only occupant of the position and he remained as Prime Minister after independence.