This research aims at analysing the function of eco-lexicons contained in conservation news texts published in mass media. The research data are in the form of conservation news text fragments presumably containing eco-lexicons. The data are then analysed using eco-linguistic distributional and referential method with an interactive analysis technique. Based on data analysis, the function of eco-lexicons contained in the conservation news texts published in mass media are as follows: (1) instrumental function, such as stating a dynamic movement; (2) representational function consisting of: (a) giving names, (b) describing characters, (c) describing activities (d) referring to a place, (e) stating art diversity, (f) describing situations, and (g) expressing types. The function of eco-lexicons contained in the conservation news texts is to provide a better understanding and knowledge for the society regarding environmental literacy. Thus, the function of eco-lexicons is to provide meaning to the environment. © 2019, ACCB Publishing.