Murray McCully is part of the New Zealand delegation attending the Forum leaders meeting in Port Moresby this week.
The situation in West Papua is one of the five big issues on the Forum agenda and there have been calls from both NGOs and West Papuans for a mission to look into allegations of human rights abuses in the Indonesian province.
However Mr McCully says he does not back the calls.
"I haven't seen a role for a fact-finding mission but I think a healthy discussion about this matter amongst leaders will be useful and I think that Papua New Guinea and the chair will bring a good sense of balance and judgement to that discussion."
March for recognition
West Papuans living on the border between Papua New Guinea and Indonesia have staged a demonstration march appealing to Pacific leaders gathered in Port Moresby for recognition of their rights to self-determination.
About 400 West Papuans from Tabubil and Kiunga in PNG's Western Province gathered at the Kiunga Police station on Monday for the procession around Kiunga.
The Co-ordinator of the West Papua Interest Association, Ronald Waromi, says the people of West Papua are hoping Pacific leaders can afford them the same recognition they have given to others such as Tahiti and the Kanaks of New Caledonia.
"West Papua is the part of Pacific therefore in this opportunity we bring our plea to all Pacific Island leaders those who will gather in Port Moresby to see that West Papua is a part of the Pacific so they must support West Papua right for self determination."