Background: Nowadays, health care section is one of the most important parts of sustained development in human societies because of having relationship with human health. Achieving this goal needs to have healthy and motivational staff, including nurses. We see nurses in all hospital wards who have been interested in their works when entering the hospital, but feel fatigue after several years and may give up their jobs. This survey has been conducted to study of effective factors on nurses' job motivation in Kerman University of Medical Sciences hospitals.

Material and Methods: This is a cross-sectional survey that studies 232 nurses occupied in Kerman university of medical sciences' hospital inpatient wards who were selected by stratified random sampling using a questionnaire which had 31 questions in 5 area: psychological, educational, financial, administrative and welfare factors. For determining the reliability of questionnaire, we conducted a pilot study and its _Krunbakh was 0.92. we used spss11.5 and Kruskal-Wallis and Mann-Whitney tests to analyze data.

Results: The results show the statistical relationships between welfare factor and hospital type (P=0.012), between psychological factor with sex, job experience and marital status (respectively, p=0/002, p=0/043 and p=0/011). But there weren't any statistical relationships between nurses' age and educational status and the studied area of motivation.

Conclusion: In this study, nurses who have following characteristics, have also better motivation status: occupying in hospital B, being married, being man, having master of science degree, having more than 10 years job experience and being between 30-40 years old.