This cross-sectional study was designed to identify Slovenian early childhood educators' beliefs concerning the importance of the competencies required to carry out physical education (PE), to identify which of those competencies early childhood educators might lack and to identify which competencies should be developed in the process of continuous professional development. For this purpose, a self-administered questionnaire was designed to examine belief statements regarding a wide scope of PE competencies among 183 early childhood educators. The participants evaluated the importance of individual competencies and reported their current and desired levels of competencies using a four-level scale. The results showed that early childhood educators believe that competencies to teach PE are an important part of early childhood education and that they need to improve in such competencies to carry out PE above the existing level. In particular, early childhood educators would like to improve in knowledge, skills and abilities that will enable them to implement PE efficiently and effectively to change children's health-related behaviours. We suggest that the gap between the self-reported beliefs about the current level of PE competencies and the desired level of PE competencies is vital for policy-makers, who aim to create unitary early childhood education and care systems in which similar qualifications and competencies among early childhood educators are needed. It seems that a lack of policy, curriculum development and educators' expertise in PE contributes to the considerable variation in the understanding of the educational role of early childhood educators within PE.