||This bachelor thesis tries to define the progress of state’s interventions in banking system in Czechoslovakia during 1918-1938. In this time period we can find a growth of state impact against commercial banking. The adoption of banking laws in 1924 and 1932 brought the biggest changes in state’s interventions in banking system. The state intervened in revision of banks, also in process of founding new banks. Control activities were delegated to professional institutions, which were founded in 1930s. These activities were discontinued by Second World War.