The purpose of the research was to determine the influence of head teachers' working experience on school performance in government secondary schools of Kasese district. The hypothesis of the study was that there is no significant relationship between head teachers’ years of experience and school performance in Kasese public secondary schools. The research design was correlational research design and its purpose was to determine the effect of head teachers’ years of experience on school performance of Kasese district public secondary school. 4 out 22 schools were selected using convenient and purposive sampling techniques. 99 out of 396 teachers were selected and 198 students out of 1100 students were selected using convenient, stratified and simple random sampling methods. Primary data was collected by self-constructed questionnaires or teachers and students and interview guides or head teachers. From the findings, 25% head teachers who participated in the study between 40 to 49, 50% were between 50 to 59 and 25% were above 59 years planning to retire, meaning they had enough experience necessary for good school performance. Additionally, most of the head teachers (50%) had spent 10 & above years, 25% had spent only 1-5 years, while 25% had spent 6-9 years in the schools they are heading. Therefore, the head teachers under study had enough working experience. Teacher quality had an average of 2.704 which an above average mean meaning that the quality of teachers was good. The study recommended that, ministry of education and sports and the education service commission should also consider other actors like academic qualification, appraisals, seminars attendance.