The purpose of this study is to examine the effect of the degree of cooperation between teachers on the satisfaction of teachers through the satisfaction of the current school and teacher efficacy. For this purpose, the third year of the Gyeonggi Education Termination Study (GEPS) was used. For the elementary, middle, and high school teachers who responded to the questionnaire, the structural equation model was applied to examine the effects among the variables. In addition, a multi-group analysis was conducted to identify differences between groups according to gender and transferability. The research results are as follows. First, the degree of cooperation among teachers had a significant effect on teacher efficacy, school satisfaction, and teacher satisfaction, school satisfaction on teacher efficacy and teacher satisfaction, and teacher efficacy on teacher satisfaction. Second, in the relationship between the degree of cooperation between teachers on the job satisfaction, both the school satisfaction and the teacher efficacy had a mediating effect, and the dual mediating effect of the school satisfaction on the teacher satisfaction was confirmed. Third, the difference in the effects of gender and transferability was confirmed, indicating that male teachers had a greater effect on teacher satisfaction or job satisfaction than teachers. Compared to this, the effect of the cooperation between teachers on the job satisfaction and the school satisfaction was greater.