The objective of this research is to find out the role of internal control to support the effectiveness of the loan systems for micro and middle enterprises given by BRI Kediri. The research design used in this study is a case study. The main finding of the research shows that the internal control has been effectively implemented. It can be seen that 93,75% respondents agree with the effectiveness of internal control. There are 92,72% respondents agree that the credit system is an effective system. Moreover, the role of internal control that supports the credit system is shown to be effective, where 93,65% respondents agree with the effective role of internal control.