High smectite clay content soils, developed on different geographical and physiographical areas (mountain regions, foot slops, floodplains) were documented in Hungary. All studied soils satisfy the criteria of “Vertisols” of the World Reference Base of Soil Resources (WRB. On the contrary there is no separate unit for high clay content soils on the higher levels of the Hungarian Soil Classification System (HSCS). The poster will present the genesis and classification problems of the examined soils. Suggestions for the improvement of classification of such soil in the HSCS, introduction of additional qualifiers for better characterization and better correlation with US Soil Taxonomy will be presented.