This study in 2005 compared the need for mental health services, actual use of services and barriers to use by 3 groups in Shiraz city in the Islamic Republic of Iran: a sample of the general population, parents of children with mental illness and primary-school teachers. Among the general population, 76.0% reported that they had wanted help in the previous 6 months and, of these, 50.0% actually sought it. The rates for parents of children with mental problems were 81.3% and 55.4% and for teachers were 60.0% and 35.0% respectively. The most common barriers to service use were logistic, especially the cost of and inconvenient access to services. Barriers related to perceptions of mental health services were also important, such as lack of trust and perceptions of friends/family.