The experiments were conducted in Gemlik olive variety (Olea europaea cv. Gemlik)'s orchard to determinate the harvesting performance of different harvesting methods namely hand, branch shaker and trunk shaker at different frequencies and compare the harvesting methods. Trunk shaker with eight different frequencies were operated. In the first and second year of the experiments at the optimum harvest time, fruit volume, fruit detachment force, fruit weight, the ratio of fruit detachment force to

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... fruit weight were found to be 3.9-4.0 cm 3 , 3.27-3.99 N, 4.23-4.28 g, 0.77-0.94 N g -1 respectively. Best results were obtained by using the trunk shaker with low frequencies as trunk shaker machine (TSM) 22 Hz. Fruit damage, tree damage levels, harvesting efficiency, duration of operation per tree and work productivity of trunk shaker with 22 Hz were found as less than 1.5%, 2.86%-7.24%, 93.93%-92.92%, 2.51-2.81 min tree -1 and 286.22-355.72 kg worker -1 h -1 respectively in two-years (2012 and 2013) trials.