Ecological intelligence is our ability to adapt to our ecological niche. Teachers can improve students' understanding on ecological intelligence values and their ability to keep and preserve environment through learning using books. This research aims at investigating and exploring ecological intelligence values of the 2013 curriculum-based Indonesian language (BI) textbooks, comprising of B7 and B8. It was carried out in the exploratory stage with descriptive explanatory strategy and content analysis. On the basis of the results of analysis, it concludes that two analysed Indonesian language textbooks for junior high school students appear to contain ecological intelligence values. Both Indonesian Language textbooks contain eight ecological intelligence values. The ecological intelligence values in BI textbooks are found in materials or readings, exercises/assignments, or evaluation. Nonetheless, the drawbacks of the textbooks lie in the materials which still focus on the cognitive aspect instead of guiding students to do concrete actions for environmental preservation. Research results contribute to the development of ideas and concepts on the need of ecological education, and writers and teachers can use them as reference to develop teaching materials to foster ecological insight and empathy among students towards environmental preservation.