The veil was "inspired by sectarianism, foreign to our country, our culture and our traditions", said Foreign Minister Abdelwaheb Abdallah.
Mr Abdallah made the comments to a meeting of the governing ruling party, the Democratic Constitutional Rally (RCD).
The veil has been banned in Tunisia in public places since the beginning of the 1990s, following the outlawing of the militant Islamist party Ennahda.
It was "a political slogan used by a small group which hides behind religion in order to realise political aims", Abdallah said.
Although Tunisia was "proud and attached to the Islamic religion", he said it "does not need anyone to give it lessons about the fundamentals of religion".
"It is a moderate country and ... rejects violence and extremism," he stressed.
Earlier this week President Zine El Abidine Ben Ali recalled the "need to distinguish between sectarian dress, imported and uninvited ... and traditional Tunisian dress, a symbol of an identity rooted in our history".
Interior Minister Rafik Belhaj Kacem has attacked "all kinds of extremism, which are introduced into our society from outside and have no link with our traditions and our sacred religion".
At another RCD meeting, he warned against "sectarian dress -- the symbol of a hardline fringe that is inward-looking and a sign of political affiliation masquerading as religion".
Such attire was "designed to deprive women of their rights", he warned.