Environmental problems today pose a threat to environmental sustainability, and the root cause of these problems is human behavior. AIM: Investigate the role of the picture book in environmental education as well as its impact on the development of environmental awareness in children. Determine whether adoptions affect the foundations of a sustainable lifestyle. Observe in addition to the information-educational, cognitive, experiential and aesthetic function, as well as the entertainment function. The importance of reading picture books as an incentive for early reading in preschool children will also be explored. EXAMINEES AND METHODS: The respondents are 120 (46%) parents from all over Croatia and 141 (54%) educators from all over Croatia. The statistical processing included (N = 261) respondents. Educators and parents completed an online anonymous self-designed survey questionnaire. The statistical program MedCalc® Statistical Software version 20 ii IBM SPSS Statistics 23 was used in the statistical processing RESULTS: We found that educators use ecological picture books in their educational work with children, but not enough. Picture books are used as a means of adopting ecological awareness and ecological upbringing in children. Educators' positive thinking about picture books as a means of ecological education proved to be correct. We have confirmed that parents are environmentally aware, so they consider the same for educators. In their socializing with children, they like to use eco-picture books as a teaching of environmentally friendly behavior. The lack of ecological education is not only present in Croatian kindergartens, but is also manifested throughout the world. CONCLUSION: The paper confirmed that parents and educators think positively about ecological picture books, very often using them as a means of teaching ecological education. It is necessary to encourage the Ministry of Education and the faculty to more effective systematic education of educators. It is desirable to encourage quality cooperation between educators and parents in order to successfully teach children environmental education with the aim that children preserve the planet for future generations.