Commercial banks are financial service businesses that are established with the motivation of profit, accept deposits and provide loans. Commercial banks with similar product and service structure use advertising and similar promotional efforts as a tool to be preferred by the target audience. With a correct advertising strategy, banks aim to increase their revenues by shifting demand, to increase their profitability by reducing the price elasticity of demand, and to increase their market share by preventing entry of new companies. In this study, the relationship between the advertising expenditure and their financial performance of deposit banks operating in Turkey was analyzed using the second-generation panel data analysis method. According to the analysis results, it is concluded that there is a relationship between advertising expenditures and loans and net profit/ loss variables, but this relationship differs on the basis of banks. On the other hand, no relationship was found between advertising expenditures and deposit collection variables.