Burnout is persistent physical, mental or emotional exhaustion caused by long term stress, resulting from excessive workplace and/or personal responsibilities. The purpose of this study was to determine burnout behaviour and its influence on productivity of teachers in public secondary schools in Bungoma South Sub-County. The focus of the study was on the, psychological influence of burnout behaviour on productivity of teachers. Survey research design was adopted which generated qualitative and quantitative data. Stratified random sampling technique was used to select 12 secondary schools and 121 teachers. One Sub-County Director of Education and 12 principals from the selected secondary schools were purposively sampled. Primary data was collected from the respondents using a questionnaire and interview schedules while secondary data was collected using document analysis guide. Descriptive statistics such as frequency counts, percentages and means and inferential statistics (ANOVA) was used to analyse data. Qualitative data was received in verbatim, cleaned and presented in themes and sub themes. Results indicate a positive psychological influence of burnout behavior on productivity of teachers. The study concluded that the psychological influence of burnout behaviour moderately influences the productivity of teachers and therefore recommended that the Ministry of Education Science and Technology and the Teachers Service Commission should develop policies that will; minimize if note eliminate situations of teacher stagnation in the same grade for many year; obligate parents to play their role by paying the mandatory school fees on time so that students are not send away to collect fees and the school management to engage parents to appreciate the capabilities of their children so that they do not put unrealistic demands on the teachers. It is hoped that findings of this study may equip education stakeholders with information to understand better the psychological influence of burnout behavior on productivity of teachers, its prevention and management.