While studying the cerebellar grey nuclei in serial horizontal sections performed at the distance of 0.5 mm from each other, a considerable individual variability was revealed. For example, the denticulate nucleus, which has greater dimentions than other cerebellar nuclei, was present in all preparations in all three planes. The emboliform nucleus, which has smaller dimentions than the denticulate nucleus, varied within greater limits in all three planes, and it was rather difficult to find its permanent zone of presence. The spherical nucleus was of small dimentions and has a wide range of individual variability, therefore, it was not possible to demonstrate its permanent place in all preparations of all three planes. The tegmental nucleus, as small as the spherical nucleus in its dimentions, was permanently demonstrated only in the medial-sagittal plane, and in two other planes its position varied-within wide range.