The purpose of the research is to know the effectiveness of committee’s role at state senior high school in Jombang regency. The research takes eleven state senior high schools as the sample. The research data is gained from some respondents of state senior high schools’ teacher as the sample. The technique of collecting data which is used is proportional random sampling with 212 samples, taken for amount 46,79% from the research population with 453 teachers. The instrument which is used are observation checklist and questionnaire. Whereas, the technique in analyzing the data is in the form of percentage. The research finding is as following: (1) the role of state senior high school’s committee in Jombang Regency as The Advisor Agency shows the effectiveness in middle level (76,41%); (2) the role of state senior high school’s committee in Jombang Regency as The Supporting Agency shows the effectiveness level (81%); (3) the role of state senior high school’s committee in Jombang Regency as The Controlling Agency shows the effectiveness in middle level (77,47%); and (4) the role of state senior high school’s committee role in Jombang Regency as The Mediator Agency show the effective category of (86,32%).
Keywords: The effectiveness, committee.