E-learning is advantageous for trainees as well as for organisation. The purpose of this research is to discover determinants of effective online training. The different theoretical currents treating the behaviour of individuals towards the technological innovation utilization permit to identify variables that determine the efficiency of e-learning. In this setting, we have made reference to five theories that are: motivation theory, social cognitive theory, media richness theory, technology acceptance theory and structure theory. This study rests upon a model elaborated by Lim and al (2007). This model contains individual, conception, technological and environmental factors. Empirical study is conducted on Tunisian 410 employees' sample. Factor analysis and structural equations have been used. Results suggest the importance of motivation, face-to-face meeting, e-mail exchange, ease of use, contents of training, seniors' support and continuous learning culture for learning performance. Learning performance, in turn, affects transfer performance.