Introduction: The hospital is known as the biggest and the most costly performing unit of health care systems therefore, paying attention to efficiency of cost is very important. Survey the technical efficiency in hospitals is the objective of this paper. Methods: This study estimate technical efficiency in hospitals of Iran University of Medical Sciences by Data Envelopment Analysis, in 2000 to 2004. Efficiency of hospitals estimated with input-oriented form of DEA-VRS by Deap 2.1 software. Data obtained by forms center of Statistics University. 

Results: The DEA results indicate that: 1-There is a potential to raise technicalefficiency 10 % in hospitals 2-constant return-to-scale (CRS) is prevalent in production process 3-hospital services have suffered extra production factors especially human resources.

Conclusion: Deletion of extra human resources can be reduced health care and hospitals expenditures. Finally recommended for future studies some factors such as quality of performance services and satisfaction of patients to be consider.