TAM posits that individual’s intention to use information system is determined by perceived ease of use and perceived usefulness. Also, intention to use information system serves the actual use. In addition, perceived usefulness is directly affected by perceived ease of use (Davis, 1989). Prior researches are generally extended TAM in three approaches including introducing factors from related models, introducing the alternative belief factors that impact intention to use, and investigating the antecedents of the existing belief factors (Wixom and Todd, 2005). This study potentially uses the contribution of TAM by introducing factors from related model. We hypothesize that perceived ease of use and perceived usefulness have the positive impacts on online social network utilization for CSR reporting, as the actual information system usage.