Suitability of cherries cultivars for machine harvesting is mainly connected with physical characteristic of fruit and plant. The development of satisfactory harvesting methods is greatly influenced by the mechanical properties of the product. In this study, the mechanical properties of sour cherries were developed using methods and equipment elaborated by authors. Mechanical parameters at different tests: compression, penetration and tension were determined with 6022 lnstron device at 10 mm/min of crosshead move. Puncture test was applied on cherry fruit and the force-deformation curve at flesh compression up to the break of skin was noticed Łutówka, Kelleris 16, Nefris and North Star cherries, hand-picked with stalk, for this study were used. Fruits were harvested at commercial maturity. The mean values of force at skin damage differ the maturity stage of cherry only for large indenter. Highest value of compression force equal 6.48 N for Kelleris 16 cultivar indicates this cultivar as a proper for mechanical harvest. The significantly lower force (1.72 N) observed at detachment for Nefris cherry shoves weakest resistance on vibration. Elaborated tests performed on cherry fruit should be proper in the estimation of mechanical strength of sour cherries and its variability of fruit quality.