Two field experiments were carried out during 2009/2010 and 2010/2011 seasons at the Agricultural Research Station of Etai El-Baroad, El-Behira Governorate, Egypt, to study the response of five wheat cultivars and its components of four nitrogen fertilizer levels ( 0 , 30 , 60 and 90 kg N/fed). To determines the following traits: number of spikes/m², plant height (cm), days of heading , physiological maturity , no.  of kernels/spike , 1000-kernel weight , grain yield, straw yield and biological yield (ton/fed).           The highest significant value of grain yield was obtained by Gemmeiza 9 , Misr 1 , Sakha 94 and Giza 168 in first season only. Vice versa, the lowest ones were observed when the  cultivar of Sakha 93 was sown in both seasons. For the interacted factors under study, in most cases, results demonstrated that the best significant values of grain, straw and biological yields were obtained by adding 60 and / or 90 kg/fed with any wheat cultivars in both seasons. On the other hand, the lowest ones were recorded for the control (without addition of N fertilizer) in both ones. The results show that cultivars differ in their response to applied N, their ability to take up soil N and that the differences can be explained by the interaction of physiological maturity and N fertilizer levels. The reversal of cultivar rankings for yield at the low and high levels of N shows the importance of evaluating cultivars at a representative level of fertility.