the aim of this study is explaining the relationship between social trust with citizenship ethic. The study population consisted of all high school students in Bushehr city that among this population, a sample of 360 students were selected by multistage random sampling method. the research tools included multi dimension comparison of recognized social support, questionnaire of social trust and citizens ethics questionnaire. To analyze the data, statistical methods such as Pearson correlation and multiple regression analysis were used. Pearson correlation coefficients showed that between Social trust and its dimension such as trust-based behavior, cooperative tendencies, openness, honesty and reliability has significantly relationship with ethics. Multiple regression analysis showed a significant positive relationship between aspects of social trust with citizen’s ethics. Predictor variables explain 22% variance of ethical citizens among high school students in Bushehr city. Among the predictor variables the cooperative intentions was the best predictive of citizens ethics and at the end the suggestions and necessary solutions were presented.
