This research is a descriptive research using the survey method. This research aims to collect elementary school teacher's opinion about the learning continuum of ecological aspects based on the level of complexity. The research data is conducted by means of a questionnaire. The research use the hypothetical population and convenience sampling. Respondents in this research consist of 156 teachersI elementary school teachers from Yogyakarta and Bantul regency. The results data are processed with statistical descriptive technique to find the data modus. Based on the results assessment of the complexity level of ecological aspect according to elementary school teacher's opinion, the learning continuum of ecological aspects can be taught at V and VI of elementary school grade, for elementary school grade ecology material with complexity level 2 (simple) and level 3 (rather complex) can be given, while for the secondary school grade, it can be taught taught at VII and VIII of junior high school grade, and for this grade ecology material can be given with complexity level 3 (rather complex) and level 4 (complex).