The purpose of this study was to develop an instrument to measure expectation of others’ environmental behavior, and notice if there is a relationship between this variable and self-report of pro-environmental behaviors. Thirteen items Likert-type were development, and was applied to a sample of two hundred eighteen Mexican young adults. The exploratory factor analysis shows a bi-factorial structure distinguishes between, expectation of pro-environmental behavior, and expectation of anti-environmental behavior. Their Cronbach’s alpha score was 0.77 and 0.79; both factors accounted for 57.65% of the variance. A scale of pro-environmental actions was applied too. A structural equation model showed that the factor expectation of pro-environmental behavior has a significant effect on pro-environmental actions. The result shows evidence for bi-factorial scale with acceptable psychometrics properties.