World Bulletin / News Desk
Caglar Demirel, a deputy from the opposition Peoples' Democratic Party (HDP), had been remanded last December.
The 5th Diyarbakir Criminal Court gave Demirel seven years and six months in prison on the charges, which he denied.
The Turkish government has accused the HDP of being linked to the PKK, which is listed as a terrorist organization by Turkey, the U.S., and the EU.
Several HDP deputies, including party leaders Figen Yuksekdag and Selahattin Demirtas, were arrested last November for allegedly failing to cooperate in a counterterrorism investigation.
The lawmakers began facing prosecution under anti-terrorism legislation after their parliamentary immunity was lifted in March 2016.
Since the PKK resumed its armed campaign against Turkey in July 2015, it has been responsible for the deaths of some 1,200 Turkish security personnel and civilians, including many women and children.