In this study, the relationships between beginning teachers' perceived stress causes, stress responses, observed teaching behaviour and attrition is investigated employing structural equation modelling (SEM). A total of 143 BTs were surveyed using the Questionnaire on the Experience and Evaluation of Work-BTs (QEEW-BT). Teaching behaviour was observed using the ICALT observation instrument. Results show that BTs' perceived negative pupil aspects relate positively to the stress responses perceived tension, discontent and negative emotions. Negative emotions, in turn, are negatively associated with observed teaching behaviour. This study also shows that discontent positively relates to attrition. Additionally, this study provides important cues to improve professional support programmes for BTs.