O'Neill met with all the leaders today, including United States President Donald Trump.
He met with them for the first full meeting of the 2017 APEC Summit in Da Nang city, Vietnam.
This is the second time Vietnam has hosted the APEC Summit. It previously hosted the Summit in 2006.
Papua New Guinea will be hosting the Summit in 2018 followed by Malaysia in 2020.
APEC brings together 21 economies from the Pacific region – the equivalent of about 60 percent of the world's gross domestic product (GDP).
(Prime Minister Peter O’Neill with US President Donald Trump in Vietnam)