Knowing physical and mechanical properties of peach could be useful not only in design of equipment for harvesting and processing but also to establish information database of this fruit. In this research some properties of peach, Tabrizi variety, were investigated. The mean of physical properties including mass, volume, dimensions (big, medium and small diameters), arithmetic mean diameter, sphericity and density were found to be 137.37 g, 107.37 cm , 61.1 mm, 60.29 mm, 59.21 mm, 60.14 mm, 96.05% and 1.24 g/cm , respectively. 3 3 The mean of mechanical properties including stiffness of peach, without and with peel, were 11.35 and 15.31 N, respectively. The linear relationship was found between mass and volume, mass and three orthogonal diameters, volume and three orthogonal diameters, stiffness without peel and geometric mean diameter, also stiffness with peel and geometric mean diameter with correlation coefficients of 0.625, 0.743, 0.63, 0.872 and 0.897, respectively.

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