This study was performed to find the prevalence and the associated risk factors with low back pain(LBP) of the staffs in a university at Kwang-ju city. The data were collected by a questionnaire including SDS(self - rating depression Scale) battery from September 1st to October 15th, 1996. The results were as follows; 1. The prevalence rate of LBP during lifetime was 73.1%, 53.1% for the last one year, and 23.6% for the last one week. 2. Statistically significant factors related to LBP during lifetime were sex and satisfaction with job. Sex, smoking, alcohol drinking, occupation, work posture, forward bending of trunk and satisfaction with job were selected as significant factors related to LBP during the last one year. The significant determinants related with LBP during the last one week were sex, smoking, alcohol drinking, occupation, forward bending of trunk and satisfaction with job. 3. Through the analysis of self - rating depression scores according to LBP, respondents with LBP had the significantly higher value of physiological disturbances and lower value of psychomotor activities than those without LBP. 4. Through the multivariate logistic regression, significantly associated factors with LBP during lifetime were selected to be female(OR=2.63, 95% CI : $1.08sim6.40$), dissatisfaction with job(OR=2.16, 95% CI : $1.16sim4.15$), those for the last one year were chosen to be female(OR=2.30, 95% CI : $1.03sim5.12$), forward bending of trunk(OR=2.18, 95% CI : $1.26sim3.79$), dissatisfaction with job(OR=1.84, 95% CI : $1.06sim3.21$), and those for the last one week were female(OR=3.00, 95% CI : $1.17sim7.69$), forward bending of trunk(OR=2.85, 95% CI : $1.38sim5.88$). In conclusion, for effective prevention of the LBP at work site, appropriate improvement of work posture and various psychological factors should be considered.