The main purpose of this research is to determine the relationship between university students’ social support perceptions and smartphone addiction. For this purpose, a quantitative research was carried out in the relational screening model. İnönü University students in Turkey are the population of the research and 496 senior students from these students constitute the sample. The data for the study were obtained through the Multidimensional Scale of Perceived Social Support (MSPSS) and The Smartphone Addiction Scale-Short Version (SAS-SV). In the data analysis, descriptive statistics, t-test and Pearson Moments Correlation coefficients were used. As a result of the research, it was found that university students' scores on social support perceptions were higher than average scores; it was determined that the level of perceived social support of female university students was statistically higher than male university students. Also, university students are below the average of smartphone addiction scores; gender did not lead to a statistically significant difference in the level of smartphone addiction among university students. Finally, it was found that there was a statistically low, negative and significant relationship between university students' social support perception level and smartphone addiction level scores.