Background: Services quality is a distinctive factor and the most powerful competitive weapon where most of servicing organizations have in their properties. Offering services improvement causes productivity, costs reduction and so increasing patients’ satisfactory.

Materials and methods: This correlation description study performed on 405 in-patients of 3 hospitals related to Islamic Azad University, Tehran Medical Branch, in 2015. They were chosen by available sampling. Information gathering was performed by a questionnaire, including 3 parts of demographic specifications, patients’ satisfaction questions and services quality evaluation (SERVQUAL).

Results: there was significant relation between patients’ satisfaction and hospital services quality on the basis of SERVQUAL model (p<0.001). 72.8% of patients were completely satisfied by hospital services in these hospitals. The highest mean (±standard deviation) score of total quality comprehension was 75.55±14.15. The highest mean score of quality services in comprehension section was for confidence and the lowest one was for tangible; and also the total quality was significant (p<0.0001).

Conclusion: Customer satisfaction is owed to services quality. Services quality analysis makes hospital management system to be able to assign financial resources for performance improvement in fields that are more effective on customer comprehension of services quality.

Keywords: Patients’ satisfaction, Hospital services quality, SERVQUAL model.