The issue split the Liberal party, with the Cabinet minister for economic development in Ontario, Joe Comuzzi, resigning over the bill on Tuesday.

But supported by most members of the Liberals, the Bloc Quebecois and other allies, the legislation passed easily.

"We are a nation of minorities and in a nation of minorities, it is important that you don't cherry pick rights. A right is a right and that is what this vote tonight is all about," Mr Martin said before the vote.

The national co-ordinator of Canadians for Equal Marriage, Alex Munter, had said the bill's approval would be "a victory for Canadian values".

"I think this is going to be a proud and exciting day to be a Canadian because we are... affirming to the world that we are a country that is open, inclusive and welcoming," he said.