Teaching and Learning International Survey (TALIS) developed by the Organization for Economic Cooperation and Development provides comprehensive information about teachers and school administrators. The purpose of this study is to investigate the relationship between teacher self-efficacy and teacher collaboration obtained from the TALIS survey. This study was designed in the relational research model. The study group of the research consists of teachers who participated in TALIS 2018. Teacher self-efficacy and teacher collaboration scales obtained from the teacher questionnaire were used as data collection tools. Canonical correlation analysis was applied to investigate the relationships between these variables. According to the findings of the study, teachers' self-efficacy in classroom management is higher than other self-efficacy sub-dimensions. However, it was concluded that the sharing and coordination sub-dimension had a higher mean than the professional cooperation sub-dimension. It was also found that these variables shared 11% of the variance. In the sets of variables that emerged as a result of the canonical correlation analysis, it was seen that the variable that made the highest contribution to the first set was the sharing and coordination variable and the lowest was the professional cooperation variable. However, according to the correlation coefficients in the second set, it was concluded that the variable of self-efficacy in classroom management made the highest contribution and the variable of self-efficacy in understanding students made the lowest contribution. As a result, it was found that there were significant and positive relationships between teachers' self-efficacy and professional collaboration. It is thought that this study will contribute to the literature by providing practical suggestions that can benefit the professional development of teachers. Within the scope of this study, it can be suggested that school principals should carry out activities in schools to increase teachers' self-efficacy beliefs, encourage professional cooperation among teachers and carry out supportive studies in this regard. In future studies, different countries can be compared with each other using the same variables. In addition, the study can be repeated with different data analysis methods using different variables that teachers have.

TALIS, teacher self-efficacy, teacher cooperation.