The aim of this research is to study the factors affecting a mechanical planting of sesame coated-seeds. The tested parameters of mechanical planting of sesame coated-seeds are metering-device speed ranged between 20 to 60 rpm and forward speed ranged between 1.82 to 4.79 km/h.  The main results in this study can be Concluded that in the following points: The maximum sesame coated-seed discharge of 4.12 kg/fed was obtained with metering-device speed of 20 rpm. Meanwhile, the minimum sesame coated-seed discharge of 2.89 kg/fed was obtained with metering-device speed of 60 rpm The maximum sesame plant-emergence of 88.4 % was obtained with forward speed of 1.82 km/h. Meanwhile, the minimum sesame plant-emergence of 77.1 % was obtained with forward speed of 4.79 km/h. By increasing forward speed from 1.82 to 4.79 km/h the total sesame seed-yield decreased from 912 to 577 kg/fed.  The operation and production costs at optimum forward speed of 2.97 km/h were 65.7 L.E/h and 96 L.E./fed.