Abstract: The experiment was conducted at the experimental Field of Sher-e-Bangla Agricultural University, Dhaka during the rabi season from November 2011 to February 2012 to investigate the role of nitrogen (N) and zinc (Zn) on seed yield contributing characters and seed quality of rapeseed (Brassica campestris L.). The experiment was factorial with two factors, factor A consisted of four different N levels viz. 0, 60, 120, 180 (kg/ha) and factor B consisted of three different levels of Zn viz. 0, 1, 2 (kg/ha). Randomized Complete Block Design (RCBD) with three replications was used in this experiment. Nitrogen significantly increased number of siliquae plant-1, thousand seed weight and oil content percent up to 120 kg N/ha but the highest dose 180 kg N/ha failed to produce better results as other doses.