The importance of efficiency and improvement of health service for resolving people’s health requirement and meeting their expectation is increasing. In addition, it considers as a priority for making decision and manager’s activity in health officials. Manager’s control on the management principle and the proper use of their management skill and creating a sense of trust and commitment are the tools that were providing a good condition for working and catching the organization’s goals. In this quasi-experimental study, before beginning the research, the non-teaching hospitals that are affiliated to the Kurdistan’s medical science university were randomly divided into 2 groups. Three hospitals from 3 cities considered as a control group, and three hospitals from 3 cities considered as an intervention group.80 person of hospital’s obstetrician staff classified in these 2 group by quota method and the hospital’s nurses and obstetrician’s manager of case-control involved by census method. The research’s tool was Hersi and Gold Smith’s standard efficiency questionnaire, which was filled out at the beginning of the study by the obstetricians of both groups and then it gave to the hospital’s nurses and obstetrician’s managers of the case group’s instructing management skills for 16 hours. The efficiency’s questionnaire was filled out, compared, and evaluated again by the obstetricians of both groups, 12 weeks after intervention. The data analyzed by the independent T-test, variance analysis, paired T-test, and SPSS 22. The findings showed that the average of the obstetrician’s efficiency mainly developed in the intervention team after the instruction of management skills to the managers (P < 0.001). Conclusion: The instruction of the management skill to the nurses and obstetrician’s managers caused the efficiency’s promotion. Therefore, the instruction of the management skills has suggested as a method of increasing efficiency in hospitals.