The aim of this study was to design and validate a scale of attitudes towards the natural environment among Spanish teenagers. 72 items were generated from the writings of 264 adolescents on attitudes towards the environment. Through expert judgement and a pilot study, a depuration was carried out, reducing the scale to 9 items that were administered to a sample of 833 adolescents of both sexes. By means of an exploratory Factor analysis, two dimensions were identified, proximal attitude and distal attitude, which were replicated through a confirmatory analysis whose results showed a good fit to the data. Reliability indices were adequate and with respect to validity significant relationships were obtained with empathy with the natural environment in its two dimensions, cognitive and emotional, and school adjustment. Significant gender differences were also found in distal, but not proximal, attitudes. Results obtained are analysed and the importance of this scale in environmental research in adolescence is also highlighted.