Abstract: In this study, five different pistachios (Kirmizi, Uzun, Halebi, Siirt, Ohadi), which are produced widely and have a great potential in future, were examined. Nut`s stem breaking strength and cluster breaking strength of these pistachio varieties were measured during the harvesting time. Mass, volumes and sphericity of samples taken from the same garden during the storage period times of 1, 2 and 3 months were measured and each samples was cracked from different positions: Vertical (A), longitudinal with open line parallel to the horizontal (B) and longitudinal with open line to parallel to vertical (C) with two different speeds (50, 100 mm min-1). Deformation and cracking force measured and cracking energy, cracking stress and modulus of elasticity were calculated and force-deformation curves were drawn. Additionally, friction resistance of fruits stored for 3 months were measured. The maximum Nut`s stem breaking strength was found as 6.4 N in Ohadi variety. The relationship between the cracking force of nuts and variety, storage time, direction of cracking, cracking speed were found statistically significant. Minimum and maximum cracking force of nuts were found 287 N, 336 N in Uzun and Siirt varieties, respectively. The method of cracking position (C) that is the most commonly used by producer created the least cracking resistance, in addition to position, cracking resistance was decreased more with cracking speed of 100 mm min-1.