The object of this study was to determine sources of teacher stress in primary schools in KwaZulu Natal South Africa. Data were collected using a questionnaire and interviews. The study revealed the following stressors in order of most to least stressful: curriculum changes work load pressures job insecurity poor relationship with colleagues reward and recognition learners discipline problems poor rapport with management and role ambiguity. Furthermore the results showed that a combination of outside and inside factors were associated with teacher stress. In terms of inside factors organisational stressors and classroom stressors were related with teacher stress.