Suitable broccoli nutrition has a great impact on curd yield and quality. There for two field experiments were carried out during the two successive winter seasons of 2013-2014 and 2014-2015 at the experimental station, Faculty of Agriculture, MansouraUniversity to study the effect of nitrogen and boron fertilization on yield and quality of broccoli. The experiment layout was split plot in a completely randomized block design arranged in three replications. Nitrogen fertilizer rates (i.e.; 60, 70, 80 and 90 kg per fed.) were present in the main plots, while boron treatments (0.4, 0.8 and 1.2 kg per fed.) were assigned in the sub plots. The results showed that the interaction between N and B was significant on vegetative growth parameters (i.e.; plant height, leaves area, leaves fresh weight, leaves dry matter percent), leaves mineral content such as N, P and K. Curds yield and its physical quality parameters (i.e.; curd weight, curd diameter and curd dry matter percent), curds chemical quality parameters (i.e.; Vit. C, T.S.S., chlorophyll a, chlorophyll b, carotenoids, N, P, K and nitrate content). On contrast the leaves number, curd length (cm) and curd compactness index were not significantly affected. The combination between nitrogen at 70 kg and boron at 0.8 kg per fed. was the most effective treatment, Since it recorded the highest values of all measured parameters and the lowest nitrate content in both seasons. On contrary, the highest level of nitrogen 80 or 90 kg with high rate of boron 1.2 kg per fed. gave the lowest values of curd yield and quality parameters.