This research aims to study the problem of liquidity excess، so it considers from the important problem that is facing the Islamic banks especially in this obstacles: 1- Modernity time of Islamic banks. 2- littleness of financial tools that used to manage the liquidity in Islamic banks. 3- Nonexistence Law are fitting with targets and field of activity of Islamic banks. And It is done that through knowing the liquidity in these banks and the tools used to manage the liquidity، inside to the best Islamic financial tools that Islamic banks are able to use in manage the liquidity.