The purpose of the current study was to investigate the role of internal factors (e.g. attitudes towards computers and internet, self-confidence, and knowledge) and external factors (perceived support) on the level of information and communication technology (ICT) usage. The participants were 1898 pre-service teachers in Turkey. The results revealed that Turkey, like many other developing countries in the world, is in the early phase of ICT integration in education. Most pre-service teachers reported that they use only basic ICT applications for educational purposes. Internal and external factors were found to be related to each other and to ICT usage level. In general, male pre-service teachers' knowledge and usage levels of ICT were higher than that of female teachers. (Contains 5 tables.)