Teacher's commitment and engagement is thought to be a critical factor in the success of
education. It has affects not only on teachers' work performance, absenteeism, burnout and turnover, but also on students' achievement in, and attitudes in school. Such commitment and engagement is reasonably dependent on the extent to which the teacher feels satisfied with life in the family and in the school. This study investigates the effect of the teacher's perceived quality of life at home and school upon his professional commitment to instruction, pupils, and the school. Drawing on preceding studies a causal model was developed to link a series of relevant categories of variables. In orther to empirically test the proposed model a questionnaire survey involving 322 primary school teachers who had been married and working in Gyoung-gi province were analysed. Significant findings were established. First, there was a strong positive correlation between the teacher's quality of life at home and work and his professional commitment. Second, there was a considerable amount of positive influence exerted by the teacher's quality of life at home and work upon his professional commitment. The satisfaction with daily life at home, along with the satisfaction with interpersonal relations at school, in particular, was revealed to have t more influence. Third, the causal links between the variables in the proposed model were corroborated, since the model was aptly validated by the relevant checking procedure. This study is pioneering in a sense that it attempted to draw out and test a causal model of the relation between the quality of the teacher's home- and school-life and his commitment to the teaching profession. Further study to reconfirm and build on the model is recommended; not only the causes but also the outcomes of the teacher's professional commitment need to be addressed extensively.