Greens Leader Richard Di Natale says it shouldn't be up to Tony Abbott or the United States to decide if Australia will join air strikes in Syria.
"Australia needs to have its own independent foreign policy, and the Parliament should decide whether or not we send Australians into harm's way," Senator Di Natale said.
"Ultimately it doesn't matter if the request to bomb Syria came from Mr Abbott or the US - the only way to be sure that political self-interest doesn't determine whether our troops are put in danger is for the Parliament to decide.
"The Abbott government has no plan and no exit strategy. This is the very definition of mission creep.
"Watching our Prime Minister, with desperate problems at home, embark on a desperately open-ended conflict on the other side of the world shows exactly why our Parliament needs to make the final call.
"Syria should be a red line in Labor's bipartisanship on this. Australia's involvement in Iraq is not making us safer, so why would we extend the mess to Syria?
"There are big question marks about the legality of airstrikes in Syria, and huge dangers in intervening in Syria's horrific civil war, so the Abbott government needs to put its case to the Parliament and ensure a full and open debate."