Bank fraud incidence reduces public confidence in banking and consequently slows down development of banking habit in Rwanda (BNR Report, 2013), however, despite the steps and measures taken by banks to prevent the occurrence of fraud, the situation still remains largely unchanged. It is therefore necessary to appraise and establish an adequate and effective internal audit in the financial institution for their orderly and efficient operations so as to guard against ever-increasing incidence of fraud. This book was aimed at assessing the impact of internal audit on strength of financial institutions with the specific objective which was to assess the internal audit practices performed in BK, to analyze the strength of BK and to determine the relationship between internal audit practices performed in BK.