Two fields Experiments were conducted at Etai Elbaroud Agricultural Research Station, Beheira Govemorate during 2001/2002 and 2002/2003 seasons to study the effect of three nitrogen levels (40, 60 and 80 kg N/ fed) and three seeding rates (40, 50 and 60 kg / fed) on wheat yield and yield components using four lines: 1) Giza 157// Sx/ Cardinal, 2) Sakha 69// Sx / Cardinal, 3) Sakha 69/ Stars", 4) Clement/ Ald "s" // Sx / Cardinal and Sakha 69 was used as a check variety. The results indicated that: 1-The highest values of plant height, length and weight of spike, number of spickelets/ spike, weight of grain/ spike, weight of 1090 grains, grain yield (ardab/ fed), straw yield (ton/fed) and chemical quality (ash %, fiber and crude protein) were obtained from the highest level of nitrogen (80 kg N/ fed.). 2-Means of all studied traits decreased with increasing seeding rate, except plant height, number of spikes/ m2, straw yield and grain yields/ fed. in both seasons. Crude protein ⁰10 increased by increasing seeding rates. 3-The effect of lines indicated that lines # 1, 2 and 3 recorded the highest values for grain yield, while the lowest value was for line # 4 over the two seasons. As for straw yield, lines # 1 and 2 gave the highest values, whereas the !owest value was for lines # 4 over the two seasons. Lines # 1, 2 and 3 improved protein %, while ash % and fiber % behaved opposite way. 4 - The interaction effects of N- levels X seed rates showed that 80 kg N/ fed with 60 kg seeds was the best treatment for grain yield, straw yield and crude protein content, while 40 kg N/ fed X 40 kg seeds gave the lowest value. Nitrogen levels X genotype indicated that 80 kg N/ fed and each of lines # 1, 2 and 3 gave the best values, whereas line it 4 gave the lowest value for the previous characters. The interaction effects of genotypes X seed rates indicated that each of lines # 1, 2 and 3 gave the best values with 60 kg seeds/ fed, whereas line # 4 gave the lowest value for the previous characters. It could be recommended that using 80 kg N and 60 kg seeds/ fed with lines of Giza 157// Sx / Cardinal, Sakha 69// Sx / Cardinal, Sakha 69/ Star"s" gave higher grain and straw yield and higher protein content than the other treatments.