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Skin protects fruits against changing external factors such as varying temperature, moisture, etc. The knowledge of its mechanical properties is thus of critical importance. The paper is focused on determination of selected mechanical characteristics of Red Haven peach skin. Such destructive experiments (tensile stress and penetration test) were performed, where fruit skin integrity was radically violated. In a peach, a part of the skin is subject to external mechanical action and resulting deformation is measured and it can be viewed as a function of parameters describing both the action and considered sample of the skin or vice versa. Several basic physical quantities such as Young’s modulus of elasticity, stress in failure, toughness, and maximal penetration pressure were determined. These quantities, depending e.g. on date of harvest and describing quality and maturity of peaches, were quantified and evaluated. The results obtained within this research can be used e.g. for creation of detailed mathematical model.