Studies related to menstrual blood and istihadhah are the most difficult and often questioned debates by women. To date, many are confused in understanding it. Although this issue is often presented in various symposia, workshops and talks, there are still many Muslim women who do not understand the methods and ways to identify differences in terms of features, colors, time periods and various issues related to it. If this problem is not resolved then it leads to prolonged confusion. This study was conducted among Islamic Teachers (GI) in SK (A) Datuk Hj Abdul Kadir Hassan, Kuching Sarawak. Instructors were selected as respondents. The objective of the study is to i) identify in detail the level of knowledge in menstruation and istihadhah education according to Mazhab Syafie, ii) study the differences between menstruation and istihadhah through the nature, color and duration of menstruation, the period between two menstruations. And the sacred period. iii) identify confidence in the worship of Islamic teachers in schools. This study was conducted using a quantitative method design. The tool used to obtain the data was a questionnaire. For the data collection method, the authors used Turath books which are authoritative and reinforced with previous research journals and studies. For the purpose of data analysis, the authors used SPSS application. Has been outlined in the study. Summary of the study of the level of menstruation and istihadhah education according to Mazhab Syafie for Islamic teachers in schools to achieve an excellent level.They can recognize the difference between menstruation and istihadhah through nature, color. And the menstrual period, the period between two menstrual periods and the sacred time and the perception to the teacher of ‘aqidah ibadah is very high. Suggestions for improvement have been stated in this study to help Muslim Teachers improve their understanding in this topic. Studies show that menstrual education and istihadhah especially to Islamic education teachers of the course and Islamic teachers in general are very important because they are agents in providing understanding to students and society.