The rights body says both Canadian and international law oblige Canada to detain Bush and investigate him for war crimes and torture.
Amnesty Canada's secretary general, Alex Neve, says Bush admits in his memoirs that he authorized the use of torture against terror suspects.
Neve says the Americans used a variety of torture methods, including waterboarding, beatings and sleep deprivation.
He says Amnesty has sent a lengthy document to the federal government, outlining its responsibilities under international law.
Bush and former president Bill Clinton are scheduled to attend an economic conference in Surrey, B.C., next week.
Read more: Canada should arrest Bush when he visits B.C.: Amnesty - CTV News