The Indonesian government’S strategies to expand the reach of earlv childhood education have an impact on flexibilities of the establishment of earlv childhood education(ECE)institutions．The government established various versions of ECE divided into three categories．They are formal,non—formal,and informal ECE settings．Non-formal early childhood education institutions have fiexibilitv in the requirement of its teachers．Thus,the educational background of non—formal earlv childhood teachers becomes very diverse．High variations in levels of educational background could have implications on the variations of professional competence ofteachers．This means that it requires an effort to strengthen and standardize the professional competence of non—formal early childhood teachers．This study aims to examine the professional competence of teachers based on their educational backgrounds,and test the impact of active learning—based training in early childhood education on the improvement of the professional competence of non．formal earlv childhood teachers．The subjects of this research were 3 1 non．formal earlv childhoodteachers in the municipality of Bandung and West Bandung regency,West Java,Indonesia．Comparative research design was used to see the difference of earlv childhood teachers’professional competence based on educational backgrounds．and one group pretest-posttest design was used to test the impact of active learning．based ECE training on the improvement of professional competence of non．formal earlv childhood teachers．The results showed that there are significant differences in earlvchildhood teachers’professional competence based on their educational backgrounds．Statistical testing on the success of training in enhancing the professional competenceof early childhood teachers show that there is a significant improvement of earlvchildhood teachers’professional competence after training,with 99．5％confidencelevel．The result of this study is expected to be the basis of empirical development ofearly childhood teachers’professional competence of non．formal earlv childhoodteachers in Indonesia．