This research has been carried out to investigate the relation between social media usage of secondary school students and their perceived human values. The population of the research consisted of 1952 students, of which 48% were female and 52% were male, 7th and 8th grade students attending secondary schools in central Adiyaman in 2014-2015 academic years. Nine secondary schools were selected randomly. Data for the research were collected through "Human Values Scale" developed by Dilmaç, and "Social Media Usage Motivation and Satisfaction Scale" developed by Ök. Data were analyzed with SPSS using independent samples t-test and one-way-ANOVA analyzes. The research showed that the longer social media usage led to the lower total points from "human values scale" in certain subscales and the higher points in others; and the gender was determined to be significant in favor of male students in social media usage and satisfaction. In the light of results some suggestions were made for researchers.