The human rights group is one of many which has publicised abuses happening at the Australian run detention camps on Nauru and at Manus Island in Papua New Guinea.
Amnesty said recent research it has conducted shows the vast majority of New Zealanders want Prime Minister John Key and his government to challenge Australia over the abuses.
Its executive director, Grant Bayldon, said the silence has been deafening, given New Zealand's willingness to point to human rights abuses in other countries.
