This research was aimed; 1) to know the quality of islamic religious education at the SMK N 1 Wadaslintang, 2) to know the participation of school commitee in increasing the quality of islamic religious education at the SMK N 1 Wadaslintang, 3) to know the support and handicap factors how did school commite in increasing the quality of islamic religious at the SMK N 1 Wadaslintang. In this research, we used a qualitative research. Qualitative search is a research that aimed to understand a phenomenon about what’s felt by research subject holisticly with the words or language. In the collecting data, we used the interview, participant observation and documentation study. And analizing data, we wear the interactive analisis that ie data collection, data reduction , data display and verification. The result of research had showed taht 1) quality of islamic religious education is so good, it showed by activity of dhuha worship and dhuhur done togetherly and on Friday, they go to mosque to pray togetherly.2) role of the school commitee in increasing quality of islamic religious education such as : as a advisory agency, as a supporting agency, as a controlling agency, and as a executive agency. 3) factor of supporting as below a good leadership, a good performance of teacher and participation of student\s adults and handicap factor were such as less of infrastructure and business of school commitee.