Although some researchers have recently studied green practices in restaurants, scant previous research has analyzed the impact of these practices on overall performance in this field. Moreover, these studies have generally focused on mega-sized restaurants in the United States. The primary objective of this study is therefore to examine the motivations for the adoption of green practices in restaurants in Spain and the impact of this adoption on firm performance. The results are based on a survey completed by 374 small restaurant managers. Structural equation modeling was used to analyze links between the studied dimensions. The findings indicate that green practices have a strong positive direct influence on operational performance and competitiveness in Spanish restaurants and that they indirectly influence overall firm performance. Therefore, the results of this paper suggest that being proactive about environmental issues can provide restaurants with a great number of benefits that improve firm competitiveness and performance.