Aim. The aim of the research was to find out the relationship between teachers’ job satisfaction and personality traits. The teaching profession belongs to the group of professions that serve other people in a special way. It involves numerous stressors that determine the quality and effectiveness of work. Personality traits may make it easier or more difficult to cope with the difficulties of the teacher’s profession and thus favour or prevent the teacher from achieving job satisfaction. Methods and materials. Two research tools were used in the research: the Life Satisfaction Scale and the HEXACO-PI-R personality questionnaire. The research was conducted on a random sample of teachers of different ages and with various years of experience. The collected data were subjected to statistical analysis to identify significant relationships between variables. Results and conclusion. The study showed a significant, positive relationship between the job satisfaction of the surveyed teachers and the level of their extroversion and conscientiousness. Therefore, it can be assumed that the surveyed teachers who achieve high results in terms of the traits of extroversion and conscientiousness are more satisfied with their work than other teachers. The remaining variables tested with the HEXACO-100 questionnaire, i.e., honesty-humility, emotionality, agreeableness and openness to experience, did not correlate with the variable job satisfaction. Moreover, it was demonstrated that there are statistically significant differences in the level of extroversion of teachers of different ages. There were no statistically significant differences between teachers with different levels of professional advancement in terms of the level of conscientiousness.