Introduction & Objective: The goal of the present study was to survey of organizational culture in Shahid modares governmental hospital and Laleh non-govenmental hospital and their impacts on employees' performance. Materials & Methods: In order to achieve the goal, organizational culture and employees performance of two hospitals were evaluated on questioner which had three parts(demographic information , organizational culture , employees performance).The Likert system in 5 scale was used for responses and finally the data was analyzed by the statistical indicator, T.test and Pierson test .Ten percent of the employees who worked in Shahid modares hospital and Laleh hospital (n1 = 70) and (n2=70) were selected to participate in this research .Results: The findings revealed ‘there was positive and significant relationship between the organizational culture and employees performances (except individual creativity, risk, critique indicators) in per two hospitals(r=0/879, P<0/01) between organizational culture indexes in shahid modares hospital, Identity, control, critique indicators and in laleh hospital, other indicators had better position .Also Between employees' performance indexes of laleh hospital, Quality, Discipline, Responsibility indicators had better position .These findings indicate the hospitals in a relatively weak position to support breastfeeding in this province.Conclusion: The health care managers should have been attention to organizational culture and their effects on employee’s performance .With this regard such as clear function, appropriate reward system to establish corporation and education continuing better organizational in environmental hospital .Also to establish job security, to recommend on self-control of employees and attention to criticisms are important in employees' satisfaction and their better performance in non_governmaental Laleh hospital.