The Tunisian, arrested Friday after a police raid on his home in the Mediterranean port Toulon, is suspected of "transmitting information and passing on instructions to terrorist organisations", Paris prosecutors said.
These organisations included Al-Qaeda and its North African offshoot, Al-Qaeda in the Islamic Maghreb, they said in a statement Tuesday.
The man, whom prosecutors did not name, is accused of passing on information on how to make bombs, on undercover government agents infiltrating extremist groups, and on trips by foreign government ministers who could serve as potential targets.
He is also suspected of playing a central role in fundraising to finance the purchase by terror groups of weapons such as rocket-launchers, missiles, and machine guns, the statement said.
He has been charged with plotting terrorist acts and financing a terrorist enterprise.