The present work was carried out in a private rice milling center, Farskour, ­­­­­Damietta Governorate, Egypt. The objective of this study was to test the rice milling machine which is widely used in most Egyptian villages. The experimental studies were carried out to evaluate the performance of a rice milling machine. The performance of the milling machine was studied under the following parameters: feed rate, clearance of out let, and grain moisture content in terms of total grain losses, overall machine efficiency, machine productivity, specific energy, criterion costs. The experimental results revealed that the highest values of machine productivity and overall machine efficiency were 1.086 and 1.173 Mg/hr., and 86.75 and 93.00% for Giza-178 and Sakha-101 varieties, respectively, while the lowest values of required power and specific energy were 11.28 and 11.05 kW; and 14.23 and 13.29 kW.hr./Mg, respectively, for the same rice varieties, furthermore the lowest values of both operational and criterion costs were 42.95 and 41.30 LE/Mg; and 271.80 and 254.28 LE/Mg, respectively, for the same rice varieties.  The optimum operating parameters of milling machine were found at 1.4 Mg/hr., feed rate with 7.5 mm clearance of out let at 12% grain moisture content for sakha 101 variaty while, for rice variety Giza 178 the optimum operating parameters of milling machine were found at 1.2 Mg/hr., feed rate with 5.0 mm clearance of out let at 14% grain moisture content.