Periodontal diseases are considered to be the most prevalent disease among population next to dental caries , they differ from other systemic diseases such as depression , cardiac diseases and diabetes in that they have clear causes and depend upon person’s daily life style . The health knowledge can play an active role in prevention of oral disease while other diseases have complicating factors that health knowledge alone is insufficient to prevent its occurrence . This study aimed to determine the level of oral health knowledge among of Damascus university students.