Pro-euthanasia campaigner Philip Nitschke has revived the debate on voluntary euthanasia with contentious comments at a conference in Perth this week.

Dr Nitschke, the director of Exit International, says people who fear getting old, not only the terminally ill, should have the right to choose voluntary euthanasia.

Some other pro-euthanasia groups have rejected his stance as too extreme.

Anti-euthanasia campaigners are concerned the comments could signal the beginning of a slippery slope where anyone and everyone has the right to voluntary euthanasia.

2ser's Biwa Kwan reports.