The greatest influence of nickel, cobalt and manganese modifiers of CuZn-based catalyst is observed at low temperatures of the ethanol steam reforming. Below 480 degrees C the most advantageous effects are: a decrease in the methane formation and an increase in the hydrogen selectivity, yield and its productivity. At 480 degrees C the formation of organic by-products (methane excluding) is almost completely depressed. However, significant lowering in the methane selectivity and a high production of hydrogen require higher temperatures of the process.