In this study Biodiesel was produced by transesterification of Balanites aegyptiaca seeds oil. The results short that physicochemical properties of the Biodiesel were viscosity at 40 C' was (5.041mm2/s), at 100 C' was (1.916 mm2/s), the density was (885.0g/ml), the cloud point of Biodiesel was (-13.5 C'), copper corrosion was (1a), flash point was (130 C'), color was (0.7), cetane number was (54.6), sulfur m/m% was (0.011). the results for blend of Biodiesel and diesel show that the viscosity of blend at 40 C' ’was (3.855 mm2/sec), at 100 C' was (1.702 mm2/s), the cloud point of blend was (5.6 C'), copper corrosion was (1a), flash point was (77.5 C'), color was (0.7), cetane number was (55.2), sulfur m/m% was (0.011).when ethanol was add to the blend the results show that viscosity of mixed at 40 C' was (3.011 mm2/s), at 100 C' was (1.053 mm2/s), the density of mixed was (845.0g/ml),the cloud point of mixed was (15.7), copper corrosion was (1a), the flash point was (40.5 C'),the color was (0.5),the cetane number was (54.6), the sulfur m/m% was (0.011).