fa تخصصي Special Original Article <div style="text-align: justify;"><span style="font-family:Times New Roman;"><strong>Background: </strong>The aim of this study was to predict self-efficacy based on professional ethics and development.<br> <strong>Methodology: </strong>The research was descriptive-correlational with structural equation modeling in terms of method, and applied in purpose. The population included all Isfahan Province Farhangian Universitychr(&#39;39&#39;)s student teachers in the academic year 2019-2020, 150 of whom were randomly selected according to the Morgan-Krejcie table (1990). The research instruments were Martin&rsquo;s teacher self-efficacy (2003), Gregorychr(&#39;39&#39;)s professional ethics (1990), and the New Jersey Institute of Professional Standards for Teachers&rsquo; professional development (2014) questionnaires, whose reliability according to the Cronbach test was 0.86. For data analysis, the descriptive statistics were analyzed in Spss₂₆ and the structural equations were analyzed in Amos₂₄.<br> <strong>Results: </strong>Data analysis results showed a professional development and self-efficacy path coefficient of 0.54 and a professional ethics and self-efficacy path coefficient of 0.69 (P<0.05) About 0.76 of the criterion variablechr(&#39;39&#39;)s changes (self-efficacy) can be explained with the &ldquo;professional development&rdquo; and &ldquo;professional ethics&rdquo; independent variables.<br> <strong>Conclusion: </strong>Therefore, professional ethics and development have a significant correlation with physical education teachers&rsquo; self-efficacy, and their professional ethics and development should receive more attention.</span></div> professional ethics, professional development, self-efficacy, physical education teachers 28 37 http://ijethics.com/browse.php?a_code=A-10-97-1&slc_lang=fa&sid=1 Mohammad Khaki Najafabadi M.khaki67@yahoo.com 10031947532846002201 10031947532846002201 No PhD Student in Physical Education, Najafabad Branch, Islamic Azad University, Najafabad, Iran Shahram Aroufzad aroufzad@yahoo.com 10031947532846002202 10031947532846002202 No Department of Educational Sciences, Farhangian University, Isfahan, Iran Mina Mostahfezian dr.mostahfezian@gmail.com 10031947532846002203 10031947532846002203 Yes Department of Physical Education and Sports Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Iran Mahdi Navidadham mahnavid@yahoo.com 10031947532846002204 10031947532846002204 No Department of Educational Sciences, Tarbiat Dabir Shahid Rajaei University, Tehran, Iran