(1) Background: Environmental issues are among society’s most pressing concerns as they can significantly impact the environment and human health. The Eco Generativity Scale (EGS), a 28-item four-factor scale has been introduced to promote a constructive outlook on the matter. It encompasses two types of generativity, namely ecological and social generativity, as well as environmental identity and agency/pathways. The aim of the current study was to examine the EGS’s psychometric properties among 375 Italian university students. (2) Methods: To evaluate the scale’s factor structure, both exploratory and confirmatory factor analyses were conducted. Internal consistency was evaluated via Cronbach’s alphas and McDonald’s omega. Concurrent validity was analyzed with the Positive and Negative Affect Scale (PANAS), Satisfaction with life Scale (SWLS), Meaningful Life Measure (MLM), and Flourishing Scale (FS). (3) Results: The exploratory factor analysis showed the best fit for a four-factor solution. Confirmatory factor analysis revealed that a four-factor higher-order model provided the best fit to the data with good internal consistency. Furthermore, each factor and the total score showed a good concurrent validity with the PANAS, SWLS, MLM, and FS. (4) Conclusions: The Eco-Generativity Scale (EGS) showed good psychometric properties for its use in research and intervention as a promising tool to measure eco-generativity.