In order to study the effect of plant arrangement (2 plants hill^-1 on one side and plant hill^-1 on two side of ridge) and hill spacing (15, 30 and 45 cm between hills) on seed yield and its components of two faba bean cultivars (Sakha 1 and Giza 843), an experiment was conducted in two growing seasons 2013/14 and 2014/15 winter seasons, in the farm of the Faculty of Agriculture, kafrelshiekh university, kafre-Elshiekh Governorate, Egypt. A split-split plot with four replications was used. The main plots were assigned to cultivars, the sub plots to plant arrangements and the sub-sub plots to hill spacing.  The data collected were: plant height, number of branches/plant, number of pods/plant, number of seeds/pod, 100 seed weight, seed yield and harvest index. Results indicated that, the cultivar Sakha 1 was superior to Giza 843 on plant height, number of branches/plant, number of pods/plant, Seeds/pod, seed weight/plant, 100-seed weight, seed yield and harvest index % .Plants arranged on one side of ridge recorded taller height and higher harvest index than  those arranged on two sides of ridges. The inverse was true in the other characters. The increases in plant density by narrowing the distance between hills resulted in significant decrease in number of pods/plant, number of seeds/pod, seed weight/plant, 100-seed weight and seed yield. However, plant height was increased by increasing plant density. Seed yield was significantly increased by increasing hill space from 15 to 30 cm. It can be concluded that sowing the faba bean cultivar ''Sakha 1'' on two sides of ridges 60 cm apart at 30 cm space between hills is the recommended treatment for optimum seed yield in Kafre El-Sheikh area.