The paper presents comparison of average static values of external friction coefficients of single caryopses of wheat of Naridana cultivar with caryopses in the-so called stabilised system at their various orientation towards the motion direction on a steel base. The research was carried out on the research position with an optielectronical system of lift angle of the plane arm. It was found out that average values of static friction coefficients of single wheat caryopses and caryopses in the stabilised system depend on the manner of their arrangement during measurements. For single caryopses, a significantly lower value of this parameter was reported in case of caryopses contact with a base with a back side up and their arrangement with longitudinal axis perpendicular towards the movement direction, whereas for caryopses in the stabilised system - at their arrangement with the back side on a steel plate and with a longitudinal axis in parallel to the motion direction. Moreover, it was determined that average values of static friction coefficients for single caryopses are considerably higher than for caryopses in the stabilised system at their identical arrangement during measurements.