Objective of this work was to investigate how plant density and nitrogen rate affects the growth , yield and its components in maize (Bassel 2 hybrid). The experiment was carried out, at the agricultural research centre in Snoubar Jableh, during the 2008 and 2009 seasons, included 12 treatments which were the combination three plant population densities 71428/ha, 57142/ha, and 47619/ha and four N rates (0, 60, 120 and 180 kg/ha). The experimental design was a split-plot, with different densities as main plots, randomized in three complete blocks, and the fertilization as subplots. The data were analyzed by using “Mstat” statistical package. Increasing planting population density delayed anthesis and silking date, increased the anthesis-silking interval, plant height, ear height, grain yield, agronomic nitrogen efficiency and nitrogen use efficiency, but decreased ear leaf area, chlorophyll content, 1000 seed weight, number of grains/ear, shelling percentage (%), and grain protein content. Nitrogen fertilizer decreased tassilling and silking date, and nitrogen use efficiency, increasing plant and ear height, ear leaf area, chlorophyll content, number of grains/ear, ear weight,1000-grains weight, Shelling percentage, grain yield up to 120 kg N/ha, agronomic nitrogen efficiency and grain protein content.