Infectious Mononucleosis is an acute infectious disease caused by Epstein-Barr virus (EBV). It is characterized by systemicsomatic complaints consisting primarily of fatigue, malaise, fever, sore throat, cervical lymphadenopathy and accompanied by atypical large peripheral blood lymphocytes. Anxiety disorder includes concern and excessive unhappiness or unrealistic over multiple life circumstances, where the individual predict that something dangerous or distressed will happen, things that he will not be able to control. The aim of this study is to explore emotional disturbance in hospitalized children infected with EBV.