A study was carried out to develop and evaluate an olive oil extracting machine. The developed machine included washing, crushing and hydraulic press units. The optimum operating condition, machine capacity, working efficiency and energy consumption for the machine units were measured and evaluated for different oil, dual purpose and mixed varieties of olive. The results show that, the average working capacity for the machine was 197.1 kg/h. While, the energy consumption for the washing and crushing units was 2.53 kW.h., and it was 8.13 kW.h for the hydraulic press unit. On the other hand, the extraction efficiency of the hydraulic press unit was varied from 84.49 to 98.33% for the pure varieties and from 87.96 to 91.81 % for the mixed varieties. Which means that, mixing of different varieties does not affect the extraction efficiency of the hydraulic press unit. In general the developed machine was proved to work satisfactorily for the pure and the mixed varieties considering working capacity, efficiency and energy consumption.