The purpose of this study was to examine and to analyze the authority of banks in providing protection to bank customers from banking crimes based on the Republic of Indonesia Law Number 21-year 2011 concerning the Financial Services Authority that has not fulfill the value of justice and to reconstruct the legal authority of the bank in protecting customers from banking crimes based on justice. The approach method used in this research was normative legal research (normative juridical), what is meant by normative legal research method is a method of legal research conducted by examining library material or secondary data. The results of the study found that banking as an institution relied on public trust, so that banks should provide guarantees to the public. The bank is safe and able to keep information confidential about customers and their savings. Thus, banking institutions need to be nurtured and monitored continuously, so that they can function efficiently, fairly, be able to compete and can protect funds deposited by customers.