Recent developments in technology make it possible to be able to connect to the Internet from anywhere, anytime through smart phones. This study aims to identify the factors that affect social network use on Smartphones of students. An extended version of Technology Acceptance Model (TAM) is shown. A questionnaire was created and applied to students from Turkey in order to examine the proposed model. Analysis of 155 participants results showed that behavioral intention to use, perceived enjoyment, perceived ease of use, perceived usefulness and social influence has either direct or indirect effects on use of social networks on Smartphones among students.