The importance of pre-service teacher training regarding environmental education (EE) has been vastly demonstrated. This systematic review examined the existing evidence from studies evaluating and analysing the relationship between EE, including environmental competences and pre-service primary school teacher training. The literature review performed included 24 documents (22 peer reviewed journal articles and two doctoral theses). The strategy followed consisted in locating documents by a reliable search strategy; establishing the criteria for the selection of documents to analyse from the documents located and rigorously analysing the documents selected based on clear and precise criteria and dimensions. In general terms, the literature review analysis has emphasised the lack of environmental competences amongst pre-service teacher students and the gaps in the teacher training curriculums regarding EE. The overall scarcity of research in this area, jointly with certain gaps and methodological limitations, affirms the need for strengthening the evidence base.