This research presents the factorial structure of an environmental beliefs scale (The Brazilian Environmental Beliefs Scale – BEBS) answered by 483 university and high school Brazilian students (170 males y 309 females) with mean age 20.7 (SD = 5.74). The BEBS is the Brazilian version (Bechtel, Corral-Verdugo and Pinheiro, 1999) of a scale that was developed from the propositions of Dunlap, Van Liere, Mertig and Jones (2000). The BEBS include general environmental beliefs and specific environmental beliefs regarding the water, energy, waste and his consumption, reuse or saving. Principal factor extraction with promax rotation was performed on 47 items from BEBS. Principal component extraction was used prior to principal factor extraction to estimate number of factors, presence of outliers, absence of multicollinearity, and factorability of the correlation matrices (Tabachnick & Fidell, 2001). The results suggested the presence of two factors that were internally consistent and well defined by the variables. The highest SMCs – squared multiple correlation, for factors from variables was .47. The Kaiser-Meyer-Olkin – KMO was .84. These analyses indicated no presence of multicollinearity or singularity and showed acceptable factorability indices. With a cut of .40 for inclusion of a variable in interpretation of a factor, 26 of the original 47 variables loaded on two factors labelled “ecocentric beliefs” (a = .81; 16 items) and “anthropocentric beliefs” (a = .72; 10 items). The ecocentric beliefs grouped items related to the environmental concern and a worldviews in which man and nature are interconnected. In this dimension the nature has intrinsic value and man and nature are in balance. Items like “To separate organic from non-organic household waste contributes to environmental conservation” and “Consumption aggravates environmental problems” are some examples of this factor. The second factor, anthropocentric beliefs, reflect an instrumental perspective of nature orientated to improve the quality of life of human hood. This dimension represent the idea that humans are the center of universe and the most important life form (Kortenkamp & Moore, 2001). Items like “Our life quality depends on the variety of good consumption” and “Consuming extra sheets of paper is pernicious, but I do not do anything against it” are examples of items that load on this factor. Additional ANOVA analyses were performed with these two factors and demographics variables (age, gender, level of study and work). Results show gender and age group differences on ecocentric and anthropocentric beliefs. The gender results seem consistent with the ethic of care associated with women (Day,2000). Analyses of the social desirability questions revealed no influence over the measure of environmental beliefs. These general results are in line with authors that argue that environmental concern has cultural differences and can vary among samples, suggesting a influence from situational variables on environmental ethical reasoning (Gooch, 1995; Bechtel, Corral-Verdugo & Pinheiro, 1999; Corraliza & Berenguer, 2000; Hernández & Hidalgo, 2000; Kortenkamp & Moore, 2001; Bamberg, 2003).