The aim of this study was to adapt Smartphone Addiction Scale, developed by Kwon et al. (2013), for Turkish high school students and to specify its psychometric characteristics. The sampling of study is comprised of 456 students, 175 boys and 281 girls, studying in state high schools in Ankara, Elazig and Kayseri. Qualitative methods were used to get the Turkish version of Smartphone Addiction Scale, which is originally English. Confirmatory factor analysis were carried out in order to get evidences about validty and reability of scale which was formed based on experts' views. According to results of confirmatory factor analysis, fit index values were found as follows: RMSEA=.058, GFI=.84, AGFI=.82, NNFI=.96, CFI=.96. Moreoever, Cronbach a values were calculated concerning to relevant measurements to obtain evidences about reliability levels for internal consistency. Cronbach a values indicated that six sub-factors and the scale as whole generate reliable measurements in acceptable level. As a result, it is concluded that SAS can generate reliable and valid measurements to be used for assessing smartphone addictions of high school students in Turkey.