The objective of this paper is to establish a comparison between French cooperative banks and non-cooperative banks in terms of Corporate Social Responsibility (CSR). One of the main limitations of existing studies is their inability to measure and verify the concrete application of the banks' speeches and communications in their actual practices. To remedy this problem, we try in this study to measure the implication of the giant French banking sector in CSR practices. We also think that it is interesting to see the evolution before and after the recent financial crisis, given the impact it had on confidence in the banking sector and on its post-crisis behavior. For this, we will consider the years 2005, 2008 and 2015. Our data are collected, for the most part, from the annual reports of banks. We have also exported some data from the Bankscope database (Bureau van Dijk). Globally, banks are becoming more transparent. They provide more information in 2008 compared to 2005, and even more in 2015. Taking into account all the criteria selected, cooperative banks occupy the top positions in 2015 with total scores higher than those of private banks. The overall ratings of private banks have deteriorated in 2015 compared to 2008, unlike the cooperative banks, for which a notable improvement was noted.