The dissemination of Information and Communication Technologies (ICT) within firms induces organizational changes which modify employee perceptions of working conditions. This article aims to evaluate the effects of the use of cell phones, computers and the Internet on job satisfaction, striving to distinguish between direct effects (due to ICT) and indirect effects (due to ICT combined with organizational changes). We have used the results of a survey by the INSEE (French national statistic institute) on standards of living in French households, conducted in October 2005. Econometric results show that these three technologies have complementary and globally positive impacts on job satisfaction, especially the computer. As for the cell phone, it has ambivalent effects, as it is also a source of stress for the employee. Finally, our results clearly show the existence of direct and indirect effects of ICT, effects which can sometimes cancel out or reinforce each other.