Based on the 2018 OECD’s Teaching and Learning International Survey, this research explored factors related to the job satisfaction of elementary school teachers in Taiwan, Japan, and South Korea from 3,441, 3,062, and 3,058 teachers, respectively, and performed regression analyses. The following conclusions were obtained. The more innovative the school teacher team of school teachers in the three countries was, the more the school teachers believed that teaching positions can affect students, and the higher is their job satisfaction. However, the teacher’s educational level, teaching positions being stable jobs, and teaching positions can all help the disadvantaged, nd there was no significant correlation with job satisfaction. The differences in the three countries included the following. 1) The job satisfaction of female teachers in Japan was significantly lower than that of male teachers, while there was no significant difference between male and female teachers in Taiwan and South Korea. 2) The more senior the teachers in Taiwan and Japan were, the lower was their job satisfaction, while in South Korea, there existed no significant correlations. 3) Teachers in Taiwan and Japan prioritized teaching positions and had higher job satisfaction, whereas, in South Korea, there existed no significant correlations. 4) The longer the working week of Japanese teachers was, the lower was their job satisfaction. However, there was no significant correlation between working hours and job satisfaction of teachers in Taiwan and South Korea. 5) The more Japanese teachers thought that teaching was a reliable income, the lower was their job satisfaction, while this relationship was not significant for teachers in Taiwan and South Korea. 6) Teachers in Taiwan thought that teaching posts made it easier to arrange their lifestyle and had higher job satisfaction. Japanese teachers had a negative correlation with job satisfaction and teaching posts made it easier to arrange their lifestyle. 7) The more teachers in Taiwan and Japan believed that they can contribute to society, the higher was their job satisfaction. However, this variable was not obvious on teachers in South Korea. The contributions of this research lay in the Confucian cultural circle, school team innovation and teaching positions can affect students, and job satisfaction was an important factor. An in-depth discussion of the results and specific suggestions were offered herein.