This study is aimed at finding out the causes of stress among teachers of public Secondary Schools in Starehe District in Nairobi. The study looks causes of stress among the teachers of Secondary Schools. The study will use descriptive research design. The target population will be two hundred and sixty eight (268) teachers in the six (6) public Secondary Schools in Starehe District but a sample of eighty one (81) teachers will be taken using stratified random sampling. Data will be collected from both primary and secondary sources which will then bevanalysed using descriptive statistics. The use of Microsoft Excel and the Scientific Package for Social Scientists (SPSS) will enable the researcher to come up with correlations of the variables. Frequency tables, curves, bar graphs and pie charts will be used to present the results of the analysis. The study is expected to come up with the research report on key factors causing stress among teachers in Kenyan Secondary Schools and identify the gaps that require further research by other researchers.