This study aims to test and prove empirically that is: a) the positive effect of intrinsic education towards understanding students about riba, b) the positive effect of extrinsic education towards understanding students about riba, c) the positive effect of organization religiosity towards understanding students about riba, d) the positive effect of family religiosity towards understanding students about riba, e) the positive effect of friends religiosity towards understanding students about riba, f) the positive effect of organization religiosity towards understanding students about riba. These sampling techniques in using the technique of convenience sampling as much as 109 questionnaires presented and 100 questionnaires that can be processed. Data that can then be processed by using multiple linear regression analysis. Based on the analysis that has been done and the results obtained that the intrinsic education, extrinsic education, learning education positive effect significantly to student understanding of usury, while variable religiosity family, religiosity friends, religiosity organization is also a positive effect significantly to students understanding of usury.