The main goal of the present research is to explain the relationship between managers’ ethical style and teachers’ social capital with mediation of organizational virtuousness in Khorramabad primary schools. The research method is descriptive-correlational by using structural equations modelling method. The sample includes 300 elementary school teachers determined by using random sampling method, based on Krejcie Morgan table. The research's quantitative data was gathered by using ethical leadership scale of Kalshovan and colleagues (2010) with alpha coefficientof 0/91, standard organizational virtuousness scale of Cameron and colleagues (2004) with alpha coefficient of 0/93, and social capital scale of Nahapiet and Goshal (1998) with coefficient alpha of 0/93. After the validity and reliability were evaluated, these scales were distributed among the samples. For analyzing the data and examining the hypothesis, the structural equation modeling with partial least squares method was used. For this purpose, Smart PLSstatistical software was employed. Finally, the findings confirmed all the research hypotheses in a way that there was a significant relation between ethical leadership style and social capital of teachers. This relationship was of greater stability, especially whenthe mediation variable of organizational virtuousness was entered into the equation. In other words, the organizational vituousness increases the relationship between ethical leadership of managers and social capital of teachers.