Austria's parliament on Wednesday approved a request from the public prosecutor's office to lift the immunity of Herbert Kickl, the leader of the far-right FPO party.
Prosecutors want to question Kickl over alleged false testimony.
The OeVP conservatives, SPOe social democrats, NEOS liberals and the Greens supported the move, the National Assembly said in a statement.
Only Kickl's Freedom Party of Austria (FPO) voted against the request, blasting what it called "persecution" aimed at weakening the party that finished top in national elections in September.
Anti-corruption prosecutors submitted the request in mid-November.
Kickl is suspected of having given false testimony in April to a parliamentary committee investigating the misuse of public funds.
He has since the spring faced accusations that he diverted public funds to pay for adverts in exchange for favourable media coverage.
Parliament also decided to lift the immunity of three other FPO MPs who attended the funeral for a former party lawmaker at which a Nazi chant was heard.
They are accused of having infringed a 1947 law that bans the reconstitution of the Nazi Party or similar organisation, propagation of its ideology or denial of Nazi crimes against humanity, such as the Holocaust.
The funeral antics sparked outrage in the country just before the elections, in which FPO scored a historic victory, although without an overall majority.
Kickl was, however, unable to find partners to form a government, which was formed by conservative Chancellor Karl Nehammer with support from the SPOe and NEOS.
