The diploma thesis deals with the new legal legislation on the field of protection of the bank client as a consumer in the legal system of Czech Republic and evaluation of the level set by regulation. The theses itself provides a complex view on particular areas of the protection of the consumer on the field of commercial banking, which has undergone major amendments during last years, such as consumer loans, payments, insurance claims from deposits and financial arbiter. Particular areas of the protection of the consumer are amended by the results of the researches concentrated on financial literacy of consumers, evaluation of the possible impacts on the consumer and banking institution and moreover there is outlined possible development i...