<p>The aim of this study was to evaluate the expectation of other people’s pro- and anti-environmental behavior and to see if this expectation correlates with own pro-environmental behavior. Two non-experimental studies were conducted using the Expectation of Other’s Environmental Behavior scale. The samples were Mexicans from Mexico City greater area, with average 35.19 and 35.05 years old. Both studies showed that participants estimated pro-environmental behavior of others as unlikely, and perceived their anti-environmental behavior as likely. Both expectations (others acting pro and anti-environmentally) demonstrated a positive effect on pro-environmental behavior of participants. &nbsp;Results are discussed in the framework of social dilemmas’ perspective, and the possibility of a uniqueness bias is discussed.</p>