Supaporn ChomchalaoThanakorn NaennaMahidol University2018-10-192018-10-192013-03-11Information Technology Journal. Vol.12, No.5 (2013), 880-89318125646181256382-s2.0-84874583407https://repository.li.mahidol.ac.th/handle/123456789/31649As governments can provide various benefits to their citizens from the use of information technologies, this study aims to investigate both the system traits and personal traits that affect citizens' decision to use e-government service. The Technology Acceptance Model (TAM) was used to understand the factors that influence citizens' willingness to use e-government service. Data were collected from a sample of 400 users of the G2C e-government service to test a model. The results found that the factors with a significant effect on perceived usefulness are: system quality, information quality, service quality, social influence and perceived ease of use. While the factors positively contributing to perceived ease of use are: system quality, service quality, self-efficacy and personal innovativeness in IT. In addition, both perceived usefulness and perceived ease of use were found to enhance e-government service use. Perceived usefulness was the most important factor in predicting citizens' intention to accept the use of e-government service. © 2013 Asian Network for Scientific Information.Mahidol UniversityComputer ScienceArticleSCOPUS10.3923/itj.2013.880.893