In this paper Neural Networks (NN) are drawn in data mining for classification and prediction. Back propagation is used as a learning algorithm. Data mining is one of the hottest current technologies of the information age. As computer systems getting cheaper and its power increases, the amount of collected and processed data available increases. Data mining is a process to discover the patterns and trends in large datasets. In our simulation, financial data set is evaluated. The expectations of bank results and our proposed Neural Network results are compared and some differences are obtained.