This study aims to investigate the effect of English Language teachers' characteristics on their self-efficacy. The teachers' characteristics in this study referred to gender, length of teaching (in years), academic qualification, teaching institution, kinds of English subject taught (EGP or ESP), and province where the respondents taught. The method used in this study was a quantitative study. The data were obtained from 84 English teachers in Indonesia using the teachers' self-efficacy

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... nnaire. There were five factors of English teachers' self-efficacy in this study: self-efficacy in teaching knowledge, teaching ethic, classroom management, instructional strategies, and student engagement. The study data were analysed, employing multilinear regression. This study revealed that gender, teaching experience, academic qualification institution, kinds of English subject taught, and province where the teachers taught simultaneously did not affect teachers' self-efficacy with 0.793, 0. 932, 0.114, 0.395, 0.436, and 0. 223, respectively.