Facebook is only an electronic communication between human but unfortunately it has become an addiction for all. This paper examines the usage of Facebook among university students and its influence in their academic performance. The impact of Facebook can either be good or bad on university students and in their academic activities. Even though a closer look on the real impact of Facebook reveals that it leads to several problems in university students academic performances. Today Facebook is somehow destroying the future and academic carrier of university students. At the same time also intended to find the significance of use of Facebook by University students in their academic success with the help of a survey conducted to collect the data among more than 250 students of different Universities in Sri Lanka.