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This study to aim Investigate the relationship between moral, supportive and oppressive leadership styles, with the psychological capital. The current research is correlative and descriptive due to its nature. For this study, 400 samples were considered. After distributing and collecting questionnaires, 20 valid questionnaires for analysis were diagnosed, so research sample group was reduced to 380 persons. The sample randomly sampled based on a list of employees. The sample randomly sampled based on a list of employees. To collect log data, organizational effectiveness, leadership oppressive questionnaire, a questionnaire ethical leadership, supportive leadership questionnaire was used. Data analysis in two levels of descriptive statistics (frequency, percentage, mean and standard deviation) and inferential statistics (Pearson correlation, multiple regression and ANOVA (analysis of variance, a statistical method in which the variation in a set of observations is divided into distinct components.)) was performed using SPSS software. According to the result of the relationship between leadership styles (ethics and fairness, clarity of roles, division of power, oppressive leadership and leadership support) with dimensions of psychological capital (self-efficacy, the ability resourcefulness, optimism and resilience) there is a significant relationship
Key words: leadership styles, moral leadership, supportive leadership, oppressive leadership, psychological capital
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