The theatre as a didactic resource in the educational field has a great pedagogical value. In recent years several educational experiences have been carried out in the classrooms where theatre has been used as a teaching-learning tool. An educational tool with great potential from which to work in the classroom on socio-environmental problems. The objective of this article is to make an approach to how primary education teachers understand that theatre favours the treatment of socio-environmental problems in the classroom in a motivating and practical way. Semi-structured interviews have been carried out with teachers who have already used theatre in their classrooms. The results have been structured on the basis of three categories: motivation and values, context and subjects, and difficulties. The potential of theatre in primary school is highlighted, with time and the number of students in the groups being the main difficulties in incorporating them into the classroom.