Objective. Chronic Obstructive Lung Disease (COPD) is the third most common cause of death in the world. Other factors than smoking could be involved in the development of COPD such as socio-economic status. The aim of this study was to investigate the association between chronic airflow obstruction and socio-economic status in Morocco. Design. In the BOLD (Burden of Obstructive Lung Disease) study carried out in Fez Morocco, questionnaires and spirometry tests were performed. Socio-economic status was evaluated using a wealth score (0-10) based on household assets. The forced expiratory volume in 1s (FEV1)/ forced vital capacity (FVC) ratio was used to measure airflow obstruction. Results. In total, 760 subjects were included in the analysis. The mean age was 55.3 years (SD=10.2); the wealth score was on average 7.54 (SD=1.63). After controlling for other factors and potential confounders, the FEV1/ FVC increased by 0.4% (95% CI: 0.01, 0.78; p<0.04) per unit increase in wealth score. Aging, tobacco-smoking, underweight, history of tuberculosis and asthma were also independently associated with a higher risk of airflow obstruction. Conclusion. Our findings suggest that airflow obstruction is associated with poverty in Morocco. Further investigations are needed to better understand the mechanisms of this association.