Ramazan Ölçen, owner of the now-closed-down Kurdish daily Azadiya Welat, was detained in a police raid on his Diyarbakır home on Saturday.
No reason was cited for his detention according to Kurdish news websites.
The paper was among the 15 pro-Kurdish media outlets closed down by a decree issued in October 2016.
The crackdown on the Kurdish media and political movement gained momentum after a failed coup on July 15, 2016 in Turkey.