 This study examined the effectiveness of an educational intervention on hand hygiene behavior among staff members of Tehran Dentistry clinics. The results showed that the intervention improved hand hygiene behavior among participants. This suggests that the health belief model, HBM, can be used as a framework for designing educational interventions to improve hand hygiene behavior to control infection in health centers. This article was authored by Reza Kuhi, Raman Panahi, Ali Ramazankini, and others.