Social networking site Facebook is the latest online avenue for social interactions. Facebook commands a lot of popularity among the students. This study was conducted to determine the relationship between time spent on Facebook and the Cumulative Grade Point Average (CGPA) of third year Biomedical Science students in the Faculty Health Sciences, Universiti Kebangsaan Malaysia. A cross sectional study was carried out and the tools to collect information were close ended questionnaire. The study found that there was no significant correlation between time spent on Facebook and students CGPA; r= 0.152, p= 0.185.There is no significant difference CGPA between gender p>0.05 and there is significant difference between race p<0.05. It can be concluded that the FSK student's CGPA achievement was not significantly associated with the time spent on Facebook.