Corporate Social Responsibility (CSR) is gaining momentum in Nigeria as organizations are recognizing the vital role it plays on firm’s financial performance. The aim of the study is to examine the mediating effect of Corporate Governance in the relationship between Corporate Social Responsibility and Financial Performance of Jaiz Bank Plc. The three variables of the study which are Corporate Social Responsibility (CSR) is proxied by charity funds, while financial performance (FP) is proxied by Return on Asset (ROA). And Corporate Governance (CG) on the other hand is proxied by Corporate Governance Index (CGI) for Islamic Financial Institutions developed by the General Council for Islamic Banks and Financial Institutions (CIBAFI) and World Bank in 2017. The study was analyzed using e-views version 4 and regression analyses was used to test the hypothesis based on the method proposed by Baron & Kenny (1986). The results reveal that CG does not mediate the relationship between CSR and FP. Although CSR seem to have significant effect on FP, the effect is a negative one due to the fact that CSR of Jaiz bank is seen to reduce its performance proxy by 0.13%. The study, thus recommends that Jaiz bank should intensify its efforts in increasing the banks profit through the accounting policy by the management due to the high costs that banks spend on CSR activity which results in decrease profit. The study also suggest that Jaiz bank should dwell more on its CSR activities because by doing so the bank will get a positive response from stakeholders which will in turn raise the image of the bank and will eventually increase the value of the bank.