Introduction & Objective : Breast cancer is the most common cancer of women & the second cause of mortality resulting from cancer among 40-44 years old women . According to the American cancer Association recommendation one of the effective secondary prevention for breast cancer is CBE. Giving information to the women regarding the chance of suffering from cancer , in such away that , it will not anxious them, will increase their cooperation . Therefore this study was hold in order to  determine the effect of education in the importance of clinical breast examination in primary girl's school’s teachers attending to the clinical centers of Yasouj City for examination in two control  & case groups, in which they were examined according to the age ,marriage condition, educational level, previous family breast cancer , etc. variables.

Materials & Methods : This is a semi – experimental study in which there were 200 teachers which were randomly divided in two groups of 100. One pamphlet regarding breast cancer , secondary prevention     importance , early diagnosis, screening & CBE attendance was given to the case group. Time & place of examination was also given to both groups. Then number of teachers attending to the centers was determined after two months. Also to collect data ,two parts questionaire including questions regarding personal charactristics , attending & unattending causes for CBE was given . Then , data was analysed with the help of S.P.S.S & descriptive statistics.

Results : Findings showed that the mean age of samples in control & case groups was 35.52 6.58& 33.11 6.05 respectively . other results showed that, in each control & case group , 9% of samples had breast hygienic problem & 91% had no problem in this respect . Also , 20% of case group samples were attending for CBE before educating them but, after giving education the number of attendance were 58% . Mean while , chisquare statistical test , showed significant relationship between attending after education in two control & case groups (p=0.00). other results has come in article in detail .

Conclusion: Giving attention to the produced results, with educational programmes in large level ,brcast problems can be diagnosed & disease progress can be prevented . Also , we can take positive step in increasing women’s knowledge & health behaviour in the society , becoming successful in continous performance & regular breast cancer screening programme.