A Moroccan-born Dane who has been on trial for terrorism agitations against the West on digital and video found at his home, was found guilty.
Mansour became the first person convicted under a 2002 anti-terrorism law that forbids instigation of terrorism or offering advice to terrorists.
He was arrested in September 2005 in Copenhagen, and has since been held in custody.
He has denied the charges, saying his mission for Islam was "peaceful." It was not immediately clear if he would appeal the ruling.
Police seized some 3,000 CD-ROMs and roughly 500 computer disks in the investigation. Many contained inflammatory jihadist speeches and gruesome images of hostages and prisoners being executed in Afghanistan and in Chechnya. He distributed the material through his small publishing house Al Nur Islamic Information.