Social order in social relations forms the basis of collective life. Disturbance in social relations can cause social disorder. The statement on theoretical framework in this research is that the erosion of social capital, that which is being called here Weak Intergroup objective and subjective relations in society, can result in disorder or law evasion. So this article explains the effect of erosion of social capital on law-evasion. In this research theories of Putnam and fukuyama are used for the analysis of social capital erosion. The method is that of the survey research. The statistical population of this study consists of all women and men of over 24 years of age in Tehran. The data was collected by the questionnaire from a sample of size 400 persons in Tehran. The method of sampling is that of multi-stage sampling. After data collection, research hypotheses were examined at two inferential and descriptive levels by Amos and SPSS package. Law evasion is divided in two dimensions: objective law-evasion (behavior) and subjective law-evasion (orientation). In contextual variables, meaningful relationship is seen among gender, marriage status, and type of job, age, education, economic position, with two dimensions of law- evasion. Basic variables in this research with their total effect on dependent variable consist of societal conception of individualism (%17), extreme individualism (%.32), civil distrust (%.15), generalized distrust (0.0109), weak formal relation (%.03) and informal relation (%.24). Generally, these independent variables explain %25 of the dependent variable variance (objective law-evasion).Whereas these variables (except informal relations) explain %40 of subjective law-evasion variance. The results show that social capital erosion has more effect on subjective law-evasion (orientation) than on objective law-evasion (behavior). Hence supporting intergroup social capital in society can revive law orientations and thereof obedience of the law in society.