The study investigated The Impact of the Basel Capital Requirements on The Performance of Egyptian Banks, using 14 years of data, which cover the period 2004-2018. This thesis empirically investigates two issues. Firstly, Research of difference in financial performance after the application of Basel II in terms of capital adequacy for the period (2004-2007) to the period (2009-2012). Secondly, Investigate the Impact of the Basel Capital Requirements on The Performance of Egyptian Banks, by research to effect of Capital Adequacy in the period (2009-2018) on Financial Performance. through A Return on Equity, Return on Assets, Net Interest Margin  and Non-Performing Loan  as dependent Variable, On the Other Hand Independent Variable Represents Capital Adequacy Ratio and Controlled Variable Are Bank Size and Time Period.For the first issue, the results of the study found Financial Indicators (ROA&ROE&NIM&NPL)  Improved After the Application of Basel II With Capital Adequacy. For the second issue, the results of the study found positive Relationship between Return on Equity, Return on Assets, Net Interest Margin and Capital Adequacy Ratio on The Other Hand The results of the study found negative Relationship between Non-Performing Loan and Capital Adequacy Ratio.