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Introduction: The feeling of security plays an extremely important role in people's lives that human beings need to achieve a healthy life and maintain social relationships. The aim of this study was to determine the model of structural equations for the development of social ethics and sense of security through the mediation of social capital in parents.
Methods: The research method was descriptive-correlation. The parents of students in three elementary, junior high and high school in Ahvaz city in 2021-2022 were the statistical population of this study, 235 of whom participated in a multi-stage random method. Data collection tools included demographic questionnaire, "Social Ethics Development Questionnaire", "Security Feeling Questionnaire" and "Social Capital Questionnaire". Content validity was assessed using qualitative method and reliability was assessed by internal consistency method with Cronbach's alpha calculation. Structural equation model and SPSS. 24 and AMOS. 24 were used to analyze the data.
Results: The proposed model had a good fit. There is also a positive and significant correlation between the development of social ethics and parents' sense of security (path coefficient 0.30). The correlation between the development of social ethics and social capital is positive and significant (path coefficient 0.34). The correlation between social capital and the feeling of security is positive and significant (path coefficient 0.23) and finally between the development of social ethics and the feeling of security mediated by social capital is a positive and significant correlation (path coefficient 0.11). 
Conclusions:  As a mediating role, social capital can increase the degree of solidarity, sense of security and the development of social ethics. Social capital is embodied in relationships between individuals and plays an effective role in promoting mental health by providing emotional and psychological support. It is suggested that psychologists and health professionals pay attention to the role of these variables in order to increase social ethics and consequently provide a sense of security.