Two field experiments were carried out at the agricultural Research and Experimental Station, Faculty of Agriculture at Noshtohor, Ealubia, Egypt, during 1984/85 1985/86 seasons to study the effect of irrigation number and NPfertilizer treatments on lentil yield and its component. Each experiment included 24 treatments which were the combination of four irrigation treatments and six NP fertilizer treatments. The results showed that, by increasing irrigation frequency up to three times significantly increased plant eight, number of branches/plant, number of pods/plant,‘umber of seeds/pod, number of seeds/plant, yields of seeds,straw, biological and protein/fad, in the two successive; seasons. Harvest index was significantly increased with increasing irrigations number up to two times in both casons. On the other hand, irrigation number had no effects protein (%) and phosphorus content of seeds. In the both seasons, plant height and number of branches plant were significantly affected with fertilization. :ncreasing levels of N and P up to 15 kg N + 48