Abstract: An apparatus for continuously measuring the degree of milling of rice grains wherein there is provided a grain passage unit, one wall of which is positioned angularly so that the grains in contact therewith slide down with their lengthwise axes generally parallel to this wall and another wall of which is positioned so that the grains introduced in the grain passage unit flow without a gap between this wall and the grains, and wherein there are provided integrated data take-up units, the inputs of which are connected to amplifiers and the outputs of which are coupled to a degree of milling meter through an arithmetic unit so that the integrated data obtained in a given period divided into a number of divisions is averaged to calculate the degree of milling sought.