A method has been developed for the assessment of the mechanical resistance of a mass of raspberry fruits to uniaxial static loading. The measure is the strain of samples of fruits in a cylinder 100 mm in diameter after 45 min of load. The mechanical strength of fruits of nine varieties was compared. The determination of the effect of such factors as temperature, ripeness, variety, duration of cold storage, and the time of harvesting on the variability of the strain was made.