This paper shows the results of a study based on path analysis about the predictive and mediator role of environmental awareness on the conceptions of Pre-service Primary teachers about science education. The model thus obtained is validated through a representative sample of 300 students from a four-year university degree for teacher training. The method of unweighted least squares is used to perform the analysis and the results show a good fit to the data model. Therefore, it is assumed that students with higher levels of environmental awareness may be more effective in their future teaching profession. Consequently, the increase in environmental practices in schools makes a small but important contribution to the overall improvement of the environment and the training of future citizens.