My research is part of PhD programme in Social Psychology, under supervision of Juan Ignacio Aragonés. Connectedness with nature could be a good predictor of environmental behavior due to its participation in the structure of environmental values and to the self concept involve in it. The main research objectives are: to obtain more accurate measures of nature connectedness in the Spanish context; to describe relations between explicit and implicit measures of connectedness, environmental identity, and environmental values; and to provide a more extensive and accurate description of the self-concept involve in connectedness with nature. Three studies were designed to achieve the objectives. Preliminar results suggest convergent and discriminant validity of one scale to measure connectedness wit nature (CNS).